Heap Overflow

Heap buffer overflow in NGINX Plus and NGINX Open Source lets unauthenticated remote attackers crash worker processes (DoS) and, on hosts with ASLR disabled or bypassed, potentially execute arbitrary code by sending crafted HTTP requests. The flaw is a data-plane-only issue triggered when a regex-based map directive references the map's regex capture variables before the map output variable in a string expression, or via a non-cacheable variable under certain conditions. F5 has released a patched version; no public exploit identified at time of analysis and it is not listed in CISA KEV.

Heap-based buffer over-write in ImageMagick's X11 import functionality exposes local systems to heap memory corruption and denial of service when processing a crafted X11 window title. Affected versions span both the 7.x branch (before 7.1.2-26) and the legacy 6.x branch (before 6.9.13-51), covering a large installed base across Linux and Unix environments. No public exploit identified at time of analysis, and the narrow exploitation conditions - requiring local privileged access with X11 in scope - significantly constrain real-world risk despite the CWE-122 heap overflow class.

Arbitrary code execution in Adobe Bridge is possible when a victim opens a maliciously crafted file that triggers a heap-based buffer overflow (CWE-122), letting an attacker run code in the context of the current user. The flaw was reported by Adobe and disclosed in advisory APSB26-81; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. Exploitation is file-borne and requires user interaction, so it is not remotely triggerable without a user opening attacker-supplied content.

Code execution in NVIDIA TensorRT is possible when the SDK processes a maliciously crafted input that overflows a heap-based buffer (CWE-122), corrupting adjacent heap memory. The flaw affects the TensorRT deep-learning inference library and requires a local user to load attacker-supplied content, per the AV:L/UI:R CVSS vector; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. Successful exploitation yields full loss of confidentiality, integrity, and availability (C:H/I:H/A:H) in the context of the process running the inference job.

Local code execution in NVIDIA TensorRT is possible when the library parses an attacker-supplied input (such as a crafted model/engine file), triggering a heap-based buffer overflow (CWE-122) that can corrupt memory and lead to arbitrary code execution in the context of the process using TensorRT. The CVSS 3.1 vector (AV:L/UI:R) indicates the attacker needs local access and must induce a user or application to load malicious content, and there is no public exploit identified at time of analysis. TensorRT is NVIDIA's deep-learning inference SDK, so the affected population is developers, MLOps pipelines, and inference servers that load third-party or untrusted models.

Heap buffer overflow in libyuv in Google Chrome on Windows prior to 150.0.7871.125 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted video file. (Chromium security severity: High)

Arbitrary code execution in Adobe Premiere Pro is possible via a heap-based buffer overflow (CWE-122) triggered when a victim opens a maliciously crafted project or media file, running attacker code in the context of the current user. The flaw is local and requires user interaction, with no public exploit identified at time of analysis; Adobe self-reported it in advisory APSB26-76. CVSS 7.8 reflects high confidentiality, integrity, and availability impact but a local attack vector gated by the user opening a malicious file.

Heap-based buffer overflow in NVIDIA TensorRT-LLM's tensor deserialization path lets an adjacent, unauthenticated attacker corrupt heap memory by supplying a crafted serialized tensor, potentially causing information disclosure, data tampering, or denial of service. All platforms running affected TensorRT-LLM versions are impacted. There is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV; NVIDIA rates exploitation as high-complexity (AC:H).

Local code execution in Windows Media on Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 lets an attacker run arbitrary code by luring a user into opening a maliciously crafted media file. The CVSS 3.1 base score is 7.8 with full confidentiality, integrity, and availability impact but requiring user interaction, and there is no public exploit identified at time of analysis. Microsoft has released a patch via MSRC.

Heap-based buffer overflow in Universal Plug and Play (upnp.dll) allows an authorized attacker to elevate privileges locally.

Local privilege escalation in the Microsoft Input Method Editor (IME) component shipped across Windows 10, Windows 11, and Windows Server 2016 through 2025 allows an authenticated, low-privileged user to corrupt heap memory and gain SYSTEM-level control. The flaw (CWE-122 heap-based buffer overflow) carries a scope-changing CVSS 3.1 score of 8.8, meaning successful exploitation escapes the caller's security boundary. Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local privilege escalation in the Windows Bluetooth Service affects a broad range of Microsoft Windows client and server editions (Windows 10 1809 through Windows 11 26H1, and Windows Server 2019 through 2025). A heap-based buffer overflow (CWE-122) lets an already-authenticated local attacker corrupt kernel/service memory to elevate from a low-privileged account to SYSTEM. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available from Microsoft.

Local code execution in Microsoft Windows' Resilient File System (ReFS) driver lets an attacker run arbitrary code by inducing a victim to mount or open a maliciously crafted ReFS volume. The flaw is a heap-based buffer overflow (CWE-122) in ReFS metadata parsing affecting Windows 10, Windows 11 (through 26H1), and Windows Server 2016-2025. CVSS is 7.8 (AV:L/UI:R); there is no public exploit identified at time of analysis and it is not in CISA KEV, so exploitation would require crafting a malicious volume and social-engineering the user to attach it.

Local privilege escalation in Microsoft Windows Routing and Remote Access Service (RRAS) allows an authenticated low-privileged attacker to elevate to SYSTEM by triggering a heap-based buffer overflow (CWE-122). The flaw affects a broad range of Windows client and server versions from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 R2 through Server 2025. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available.

Remote code execution in Microsoft Windows Media Foundation allows an unauthenticated attacker to run arbitrary code by tricking a user into opening a maliciously crafted media file or stream. The flaw is a heap-based buffer overflow (CWE-122) affecting a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. There is no public exploit identified at time of analysis, and the issue is not listed in CISA KEV; a vendor patch is available via the Microsoft Security Response Center.

Remote code execution in Microsoft Windows Media Foundation lets an unauthenticated attacker run arbitrary code in the victim's context by delivering a malicious media file or stream that the target opens or plays. The flaw affects the Media Foundation multimedia framework across supported Windows 10, Windows 11 (through 26H1), and Windows Server 2016-2025 builds, and carries CVSS 8.8. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the CVSS profile of confidentiality, integrity, and availability all rated High marks this as a high-priority client-side RCE.

Remote code execution in Microsoft Windows Media Foundation lets an unauthenticated network attacker run arbitrary code on the victim's machine when the target opens or renders a maliciously crafted media file or stream. The flaw is a heap-based buffer overflow (CWE-122) affecting a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Server 2016 through Server 2025. No public exploit identified at time of analysis, but the low complexity and network vector make it a high-priority patch item; exploitation requires user interaction (UI:R).

Local privilege escalation in the Windows Network File System (NFS) component allows an authenticated attacker to elevate to SYSTEM by triggering a heap-based buffer overflow (CWE-122). Reported by Microsoft and affecting a broad range of Windows 10, Windows 11, and Windows Server 2012-2025 releases, with a vendor patch available via MSRC. No public exploit identified at time of analysis, and no CISA KEV listing.

Privilege escalation via a heap-based buffer overflow in the Windows Network File System (NFS) role lets an authenticated, low-privileged network attacker send crafted requests to corrupt server heap memory and gain elevated privileges. Affected systems span Windows 10 (1607 through 22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2012 through 2025 wherever the Server for NFS role is present. No public exploit was identified at time of analysis and the flaw is not in CISA KEV, but the 8.8 CVSS with a network-reachable, low-complexity, no-user-interaction profile makes it a meaningful patch priority on NFS hosts.

Local code execution in Microsoft Windows Media Foundation (CWE-122 heap-based buffer overflow) lets an unauthorized attacker run arbitrary code when a victim opens a maliciously crafted media file or content that the platform parses. It affects a broad range of Windows client and server builds from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local privilege escalation in the Windows NTFS driver lets an already-authenticated attacker corrupt heap memory to run code at a higher privilege level (typically SYSTEM) on affected Windows 10, Windows 11, and Windows Server builds. Microsoft reported the issue and has shipped a fix; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. With CVSS 7.8 (AV:L/PR:L) it is a valuable post-compromise pivot rather than an initial-access bug.

Remote code execution in the Microsoft Windows DHCP Server role allows an unauthenticated network attacker to run arbitrary code by triggering a heap-based buffer overflow (CWE-122) in the service's packet handling. The flaw carries a CVSS 9.8 with a fully remote, no-interaction, no-privilege vector and affects Windows Server 2012 through 2025 (plus the Windows 10 1607/1809 code base). At time of analysis there is no public exploit identified and the issue is not listed in CISA KEV, but the unauthenticated network-facing nature of the DHCP service makes it a high-priority patch.

Local code execution in Microsoft Office Excel (across Microsoft 365 Apps for Enterprise, Office LTSC 2021/2024, and their macOS counterparts) arises from a heap-based buffer overflow (CWE-122) triggered when a victim opens a maliciously crafted spreadsheet. An unauthorized attacker can achieve arbitrary code execution in the context of the current user, gaining high confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV, but a vendor patch is available from Microsoft.

Local code execution in Microsoft Excel (Office 2016 through Office LTSC 2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) allows an attacker to run arbitrary code when a victim opens a maliciously crafted spreadsheet. The flaw is a heap-based buffer overflow (CWE-122) triggered during file parsing, giving full confidentiality, integrity, and availability impact in the user's context. No public exploit identified at time of analysis, and it is not listed in CISA KEV, so exploitation currently appears theoretical rather than active.

Arbitrary code execution in Microsoft PowerPoint (and the broader Microsoft Office/365 suite on Windows and macOS) arises from a heap-based buffer overflow (CWE-122) triggered when a victim opens a maliciously crafted presentation file. An attacker who cannot log in to the target can still run code in the context of the current user by convincing that user to open the booby-trapped file, giving full confidentiality, integrity, and availability impact on the affected host. Microsoft has released a patch; there is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV.

Local code execution in Microsoft Office PowerPoint (including Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, and their macOS variants) arises from a heap-based buffer overflow triggered when a victim opens a maliciously crafted presentation file. Successful exploitation runs attacker-controlled code with the privileges of the current user, yielding full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV, but Microsoft has released a patch.

Local code execution in Microsoft Office OneNote (Microsoft 365 Apps for Enterprise and Office for Mac editions) arises from a heap-based buffer overflow (CWE-122) that lets an attacker run arbitrary code in the context of the current user when a victim opens a maliciously crafted OneNote file. The CVSS 3.1 score is 7.8 with a local attack vector requiring user interaction (AV:L/UI:R), and impact is total across confidentiality, integrity, and availability. There is no public exploit identified at time of analysis, and CISA SSVC lists exploitation status as none.

Local code execution in Microsoft Office PowerPoint (CWE-122 heap-based buffer overflow) lets an unauthorized attacker run arbitrary code when a victim opens a maliciously crafted presentation file. The flaw affects a broad Office footprint - PowerPoint 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and multiple Office for Mac builds - and requires user interaction (opening the file) but no prior privileges. A vendor patch is available via MSRC; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local code execution in Microsoft Word (Office 2016/2019, Microsoft 365 Apps, Office LTSC 2021/2024) arises from a heap-based buffer overflow triggered when a victim opens a maliciously crafted document. An attacker who convinces a user to open a booby-trapped file can run arbitrary code in that user's context, achieving full compromise of confidentiality, integrity, and availability on the host. No public exploit identified at time of analysis and the flaw is not listed in CISA KEV, though a vendor patch is available per Microsoft's MSRC advisory.

Local code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, 365 Apps for Enterprise, and Office for Mac) arises from a heap-based buffer overflow (CWE-122) that an attacker triggers by getting a victim to open a maliciously crafted Office document. Rated CVSS 7.8 with high impact to confidentiality, integrity, and availability, exploitation requires user interaction but no prior authentication or privileges. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV, but Microsoft has released a patch via the MSRC update guide.

Local code execution in Microsoft Office (Microsoft 365 Apps, Office 2016/2019, LTSC 2021/2024, and Office for Mac) arises from a heap-based buffer overflow (CWE-122) that an attacker triggers by convincing a user to open a maliciously crafted document. The CVSS 3.1 score is 7.8 (AV:L/AC:L/PR:N/UI:R) with high impact to confidentiality, integrity, and availability, meaning code runs in the context of the current user. No public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available via MSRC.

Arbitrary code execution in Microsoft Office Excel arises from a heap-based buffer overflow (CWE-122) that an attacker triggers when a victim opens a maliciously crafted spreadsheet, running code in the security context of the current user. The flaw spans a broad Office footprint including Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the macOS Office editions, and Office Online Server. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; the CVSS 7.8 rating reflects high impact gated by required user interaction.

Local code execution in Microsoft Excel arises from a heap-based buffer overflow (CWE-122) that an attacker triggers by luring a victim into opening a maliciously crafted spreadsheet, yielding attacker code in the user's security context. It affects a broad Office family including Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the macOS editions, and Office Online Server. The CVSS 3.1 base score is 7.8 and the vector requires user interaction (UI:R); there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local code execution in Microsoft Office Excel (across Microsoft 365 Apps, Office 2016/2019, LTSC 2021/2024, Office for Mac, and Office Online Server) stems from a heap-based buffer overflow (CWE-122) that an attacker triggers when a victim opens a maliciously crafted spreadsheet. Rated CVSS 7.8 with no privileges required but mandatory user interaction, successful exploitation yields full confidentiality, integrity, and availability impact in the context of the victim user. There is no public exploit identified at time of analysis and it is not on the CISA KEV list, but Microsoft has released a patch.

Arbitrary code execution in Microsoft Excel (spanning Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) allows an unauthorized attacker to run code in the victim's context by tricking them into opening a maliciously crafted spreadsheet. The flaw is a heap-based buffer overflow (CWE-122) that executes with the local user's privileges once the file is opened. Microsoft has released a patch; there is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV.

Local code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and Office for Mac) arises from a heap-based buffer overflow (CWE-122) triggered when a user opens a maliciously crafted document. Rated CVSS 7.8 (AV:L/UI:R), an attacker who convinces a victim to open a weaponized file can run arbitrary code in the context of the current user. Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local code execution in Microsoft Word (and the wider Microsoft Office / Microsoft 365 Apps family) lets an unauthorized attacker run arbitrary code when a victim opens a maliciously crafted Word document that triggers a heap-based buffer overflow. All impacted SKUs - Microsoft 365 Apps for Enterprise, Office 2019, Office LTSC 2021/2024, the macOS Office builds, and SharePoint Server (which renders Office documents server-side) - are affected, and Microsoft has released a patch. There is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV.

Local code execution in Microsoft Excel (and the broader Office family including Microsoft 365 Apps for Enterprise, Office 2019/2021/2024 LTSC, Office for Mac, and Office Online Server) stems from a heap-based buffer overflow that triggers when a user opens a maliciously crafted spreadsheet. The CVSS vector (AV:L/AC:L/PR:N/UI:R) indicates an unauthenticated attacker gains full code execution in the victim's context but only after the target opens the file. No public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available from Microsoft (MSRC CVE-2026-55041).

Local arbitrary code execution in Microsoft Office (Microsoft 365 Apps for Enterprise, Office 2016/2019, Office LTSC 2021/2024, and their macOS equivalents) arises from a heap-based buffer overflow (CWE-122) that an attacker triggers by convincing a user to open a maliciously crafted Office document. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R) shows the flaw requires user interaction but no prior privileges, yielding full high-impact compromise of confidentiality, integrity, and availability in the user's context. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, so exploitation status is not currently confirmed.

Arbitrary code execution in Microsoft Excel (across Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) arises from a heap-based buffer overflow (CWE-122) that triggers when a victim opens a maliciously crafted spreadsheet. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R) confirms this is a local, user-interaction-dependent file-format attack rather than a remote network exploit, yielding code execution in the context of the current user. No public exploit has been identified at time of analysis, and the CVE is not listed in CISA KEV; a Microsoft patch is available.

Local code execution in Microsoft Office (Microsoft 365 Apps, Office 2016/2019, LTSC 2021/2024, Office for Mac, and SharePoint Server) arises from a heap-based buffer overflow (CWE-122) that an unauthorized attacker triggers when a victim opens a maliciously crafted document. The CVSS 3.1 base score is 7.8 (AV:L/AC:L/PR:N/UI:R) with high confidentiality, integrity, and availability impact, meaning successful exploitation yields full code execution in the context of the current user. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the ubiquity of Office makes it a high-priority patch target.

Local code execution in Microsoft Office (365 Apps for Enterprise, Office 2016/2019, and Office LTSC 2021/2024) arises from a heap-based buffer overflow that an attacker triggers when a victim opens a maliciously crafted Office document. Successful exploitation yields full confidentiality, integrity, and availability impact in the context of the current user. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the ubiquity of Office and the low attack complexity make this a meaningful patch priority.

Local code execution in Microsoft Office (Microsoft 365 Apps for Enterprise, Office 2016/2019, and Office LTSC 2021/2024) arises from a heap-based buffer overflow (CWE-122) that an attacker triggers by convincing a user to open a maliciously crafted Office document. Successful exploitation yields full code execution in the context of the current user, with high impact to confidentiality, integrity, and availability. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; SSVC rates current exploitation as none.

Remote code execution in Minecraft Bedrock Dedicated Server allows an unauthenticated network attacker to corrupt heap memory and run arbitrary code via a specially crafted packet, per CVSS:3.1/AV:N/AC:L/PR:N/UI:N (9.8 Critical). The flaw (CWE-122 heap-based buffer overflow) was reported by Microsoft, which has released a fix; there is no public exploit identified at time of analysis and no EPSS or CISA KEV data was supplied, so exploitation remains theoretical but the pre-auth, low-complexity profile makes it high-priority to patch.

Local privilege escalation in the Windows Desktop Window Manager (DWM) lets an already-authenticated, low-privileged attacker corrupt heap memory (CWE-122) to gain SYSTEM-level control across Windows 10 (1607 through 22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2016 through 2025. The CVSS 3.1 score of 8.8 reflects a scope change into a higher-integrity context with full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and the flaw is not listed in CISA KEV; Microsoft has released a patch.

Privilege escalation in Microsoft Windows DHCP Server (across Windows Server 2012 through 2025 and Windows 10 1607/1809) allows an authenticated attacker on an adjacent network to elevate privileges by triggering a heap-based buffer overflow (CWE-122). Exploitation yields full confidentiality, integrity, and availability impact (C:H/I:H/A:H) on the affected server, effectively giving the attacker high-privilege control of the DHCP service host. There is no public exploit identified at time of analysis, and the flaw is not listed in CISA KEV.

Local privilege escalation in Microsoft's Windows Hyper-V hypervisor allows an already-authenticated, high-privileged attacker to corrupt heap memory (CWE-122) and elevate to higher privileges on the host. The scope-changed CVSS 3.1 vector (8.2) reflects that a successful exploit can breach the guest/host virtualization boundary, impacting confidentiality, integrity, and availability of the underlying host. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; a Microsoft patch is available.

Local privilege escalation in the Microsoft Windows Search Component affects Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025, where a heap-based buffer overflow lets an already-authenticated local attacker corrupt memory and elevate to higher privileges (up to SYSTEM). The CVSS 3.1 score of 7.8 reflects local-only attack with low privileges required and no user interaction, yielding full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Privilege escalation via heap-based buffer overflow in the Windows NTFS filesystem driver affects a broad range of Windows 10, Windows 11, and Windows Server versions, requiring only physical access to the target device - no OS credentials needed. An attacker with hands-on access to the hardware can trigger a heap overflow in NTFS processing to gain elevated privileges, potentially achieving full system compromise (High C/I/A). No public exploit code has been identified and this CVE is not listed in the CISA KEV catalog, but the combination of zero authentication requirements and critical-level impact makes it a realistic threat for physically accessible endpoints. A vendor-supplied patch is available via the Microsoft Security Response Center.

Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 through 2025) releases lets an unauthorized attacker run arbitrary code when a victim opens a maliciously crafted media file. The flaw is a heap-based buffer overflow (CWE-122) reported by Microsoft with a vendor patch available; there is no public exploit identified at time of analysis. CVSS is 7.8 (High), driven by full confidentiality, integrity, and availability impact but gated by local vector and required user interaction.

Remote code execution in the Microsoft Windows DHCP Server role allows an unauthenticated network attacker to run arbitrary code by triggering a heap-based buffer overflow (CWE-122) in the service's packet handling. The flaw carries a critical CVSS 9.8 (AV:N/AC:L/PR:N/UI:N) and affects Windows Server 2012 through 2025 as well as the underlying Windows 10 1607/1809 code base. There is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV, but the unauthenticated network RCE profile makes it a high-priority patch.

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code with a physical attack.

Local privilege escalation to code execution in the Windows NTFS file-system driver stems from a heap-based buffer overflow (CWE-122) that an authenticated local attacker can trigger to run arbitrary code with elevated privileges. The flaw was reported by Microsoft and spans a broad range of currently-supported Windows client and server releases, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the low attack complexity and reliable memory-corruption primitive in a core kernel-mode driver make it a strong candidate for patch-Tuesday prioritization.

Local privilege escalation in the Windows Win32K kernel subsystem (CWE-122 heap-based buffer overflow) lets an already-authenticated low-privileged attacker corrupt kernel heap memory and gain SYSTEM-level control across a broad range of Windows client and server releases. The flaw carries a CVSS 3.1 base score of 8.8 with a changed scope (S:C), reflecting that a user-mode process can compromise the kernel security boundary. It was reported by Microsoft, a vendor patch is available, and there is no public exploit identified at time of analysis.

Local privilege escalation in the Windows Print Spooler Components affects Windows 10 (1809, 21H2, 22H2), Windows 11 (24H2, 25H2, 26H1), and Windows Server 2019/2022/2025, where a heap-based buffer overflow (CWE-122) lets an already-authenticated local user corrupt heap memory in a Spooler component and gain SYSTEM-level privileges. Exploitation requires low-privilege local access (CVSS AV:L/PR:L) with no user interaction, yielding full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV.

Local privilege escalation in the Microsoft Windows Kernel lets an already-authenticated attacker corrupt heap memory to gain SYSTEM-level control across Windows 10 (1809/21H2/22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2019/2022/2025. The CVSS 7.8 (AV:L/PR:L) rating reflects that low-privileged code execution is a prerequisite; there is no public exploit identified at time of analysis, but Microsoft has released a patch. This is a classic post-exploitation escalation primitive rather than an initial-access vector.

Local privilege-level code execution in the Windows NTFS file-system driver affects a broad range of Windows client and server releases, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. A heap-based buffer overflow (CWE-122) lets an authorized local attacker who can induce a user to interact with a crafted file or volume execute arbitrary code in the security context of the kernel-mode NTFS component. There is no public exploit identified at time of analysis and it is not in CISA KEV, but Microsoft has released a patch and the flaw carries full high confidentiality, integrity, and availability impact.

Local privilege escalation in the Windows Web Proxy Auto-Discovery (WPAD) service affects Windows 10 Version 1607 and Windows Server 2012, 2012 R2, and 2016 (including Server Core installations), where a heap-based buffer overflow (CWE-122) lets an authenticated local attacker corrupt kernel/service heap memory and elevate to higher privileges. Microsoft has released a patch and reported the flaw itself; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. The CVSS 3.1 base score is 7.8 (AV:L/AC:L/PR:L/UI:N) reflecting a high-impact but locally-scoped attack requiring existing low-privilege access.

Local privilege escalation in the Microsoft Windows Kernel lets an already-authenticated attacker corrupt heap memory (CWE-122) to run code with SYSTEM-level privileges. It affects a broad range of supported Windows client and server releases (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through Server 2025). No public exploit identified at time of analysis, but the CVSS 8.8 rating and scope change make it a strong candidate for chaining after initial access.

Local code execution in Microsoft Windows' Resilient File System (ReFS) driver lets an unauthorized attacker run arbitrary code by inducing a victim to mount or open a maliciously crafted ReFS volume (CVE-2026-50362). The flaw affects the ReFS component shipped across Windows 10, Windows 11 (through 26H1), and Windows Server 2016-2025, carries CVSS 7.8, and requires user interaction (UI:R) with no prior authentication (PR:N). Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Remote code execution in Microsoft Windows Message Queuing (MSMQ) allows an unauthenticated attacker to run arbitrary code over the network by corrupting heap memory. The flaw (CWE-122) carries a CVSS 9.8 and affects a broad range of client and server SKUs from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. No public exploit is identified at time of analysis, but the network-reachable, no-interaction, no-privilege profile of prior MSMQ bugs (e.g. the 'QueueJumper' class) makes this a top-priority patch. Microsoft has released a fix.

Local privilege escalation to code execution in the Windows NTFS driver (CVE-2026-50417) allows an authenticated attacker with low privileges to corrupt heap memory and run arbitrary code on affected Windows 10, Windows 11, and Windows Server 2012 through 2025 systems. The flaw is a heap-based buffer overflow (CWE-122) reported by Microsoft, with CVSS 7.8 (High) reflecting local vector, low complexity, and full confidentiality/integrity/availability impact. No public exploit identified at time of analysis, and it is not listed in CISA KEV.

Local code execution in Microsoft Windows NTFS (New Technology File System) driver arises from a heap-based buffer overflow (CWE-122) that an attacker can trigger by inducing a user to interact with a specially crafted NTFS volume or file. Affecting a broad range of Windows client and server builds from Windows Server 2012/2012 R2 through Windows 11 26H1 and Windows Server 2025, successful exploitation yields high confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV; Microsoft has issued a fix.

Local code execution in Microsoft Windows NTFS (the New Technology File System driver) arises from a heap-based buffer overflow that lets an attacker run arbitrary code with the privileges of the affected process. The flaw affects a broad swath of supported Windows client and server builds, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. Microsoft (the reporter) has shipped a patch; there is no public exploit identified at time of analysis, and the CVSS vector requires local access plus user interaction, so it is a privilege-escalation/code-execution primitive rather than a remotely-wormable bug.

Local code execution in the Microsoft Windows NTFS file-system driver lets an attacker run arbitrary code by triggering a heap-based buffer overflow (CWE-122) when Windows parses crafted file-system metadata. The flaw spans a broad range of supported releases, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. It carries a CVSS 7.8 (Important) rating, requires user interaction, has a vendor patch available, and no public exploit identified at time of analysis.

Local privilege escalation in the Windows Media component of Windows 11 (versions 24H2, 25H2, and 26H1) allows an already-authenticated low-privileged user to run code with elevated (typically SYSTEM) rights by triggering a heap-based buffer overflow. Microsoft, the reporting party, has released a patch through its Update Guide. No public exploit identified at time of analysis, and the flaw is not listed in CISA KEV, so there is no evidence of active exploitation, though EIP-class memory-corruption bugs in core OS components are attractive follow-on targets after initial access.

Heap-based buffer overflow in Windows DirectX allows an authorized attacker to elevate privileges locally.

Denial-of-service (and possible privilege-elevation) heap-based buffer overflow in the Microsoft Windows Remote Desktop Client is reachable over the network, with Microsoft's CVSS vector recording only an availability impact (A:H) despite the description's 'elevate privileges' wording. A patch is available from Microsoft (MSRC update guide), the flaw was reported by Microsoft itself, and there is no public exploit identified at time of analysis. Affected platforms span the full supported Windows client and server line, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025.

Local code execution in Microsoft Windows arises from a heap-based buffer overflow in a Windows Data DLL, letting an attacker who can get a victim to open crafted content run arbitrary code with the victim's privileges. Affected builds span Windows 10 (1607 through 22H2), Windows 11 (24H2, 25H2, 26H1), and Windows Server 2012 through 2025. Microsoft (the reporter) has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Remote code execution in the Microsoft Windows DHCP Server role allows an unauthenticated, adjacent-network attacker to run arbitrary code by triggering a heap-based buffer overflow (CWE-122) in DHCP message parsing. Affected systems span Windows Server 2012 through Windows Server 2025 (including Server Core installations) plus the DHCP service on Windows 10 versions 1607 and 1809, with full confidentiality, integrity, and availability impact. Microsoft has released a patch; there is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.

Local privilege escalation in the Microsoft Windows Resilient File System (ReFS) driver allows an authenticated attacker to run code with SYSTEM-level privileges by triggering a heap-based buffer overflow. The flaw (CVSS 7.8) affects a broad range of Windows 10, Windows 11, and Windows Server 2016-2025 builds and carries high confidentiality, integrity, and availability impact. It is a Microsoft-reported issue with a vendor patch available, and there is no public exploit identified at time of analysis.

Local code execution in the Windows Media component of Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 allows an authenticated local attacker to run arbitrary code by triggering a heap-based buffer overflow. Successful exploitation yields high confidentiality, integrity, and availability impact within the current security context, and Microsoft has released a patch. No public exploit identified at time of analysis, and the flaw is not listed in CISA KEV.

Remote code execution in Microsoft Windows GDI+ (gdiplus) lets an unauthenticated network attacker run arbitrary code when a victim opens or renders a specially crafted image, via a heap-based buffer overflow (CWE-122). The flaw affects a broad range of supported Windows client and server builds (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through 2025). It carries a critical CVSS 9.6 with a scope-changed impact, but requires user interaction and currently has no public exploit identified at time of analysis.

Local code execution in Microsoft Windows NTFS driver (heap-based buffer overflow, CWE-122) allows an attacker to run arbitrary code with the privileges of the exploited context. The flaw affects a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. CVSS 7.8 with high confidentiality, integrity, and availability impact; exploitation requires local access and user interaction, and there is no public exploit identified at time of analysis.

Local code execution in Microsoft Windows NTFS arises from a heap-based buffer overflow (CWE-122) that an authorized, low-privileged local user can trigger to run arbitrary code and elevate to SYSTEM. The flaw spans a broad Windows footprint from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. No public exploit identified at time of analysis, and the CVSS 3.1 base score is 7.8 (High).

Local code execution in the Windows NTFS file system driver lets an unauthorized attacker run arbitrary code by tricking a user into interacting with specially crafted content, per Microsoft's MSRC advisory. The flaw is a heap-based buffer overflow (CWE-122) affecting a broad range of Windows releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. No public exploit is identified at time of analysis and it is not listed in CISA KEV, but the low attack complexity and full-CIA impact make it a meaningful local code-execution risk.

Local privilege escalation in the Windows Push Notifications component (WNS/WpnService) lets an already-authenticated low-privileged user overwrite adjacent heap memory to gain SYSTEM-level control across Windows 10 (1607-22H2), Windows 11 (24H2-26H1), and Windows Server 2012 R2 through 2025. Microsoft reported the flaw and has shipped a fix; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. The high CVSS 7.8 reflects full confidentiality, integrity, and availability impact once triggered, but exploitation requires prior local access.

Local privilege escalation in the Windows Kernel lets a low-privileged, authenticated attacker gain SYSTEM-level control by triggering a heap-based buffer overflow (CWE-122). The flaw spans a broad platform range from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025, and was reported internally by Microsoft. No public exploit is identified at time of analysis and it is not in CISA KEV, but the ubiquity of the affected component plus full high impact on confidentiality, integrity, and availability make it a meaningful patch priority.

Heap-based buffer overflow in Windows USB Video Driver allows an unauthorized attacker to elevate privileges with a physical attack.

Local code execution in the Windows NTFS driver (CVE-2026-49797) allows an attacker with local access to run arbitrary code by tricking a user into interacting with a maliciously crafted NTFS artifact, exploiting a heap-based buffer overflow (CWE-122). The flaw affects a broad range of Windows client and server releases from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. Microsoft has released a patch; no public exploit identified at time of analysis and it is not listed in CISA KEV.

Local code execution in Windows GDI+ (the Graphics Device Interface Plus rendering component) affects a broad range of Microsoft Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. An attacker who convinces a user to open or preview a specially crafted image or document triggers a heap-based buffer overflow (CWE-122) during graphics parsing, yielding arbitrary code execution in the context of the current user. The CVSS 3.1 base score is 7.8 (AV:L/AC:L/PR:N/UI:R); there is no public exploit identified at time of analysis and it is not listed in CISA KEV, but GDI+ image-parsing flaws are historically attractive to attackers.

Local privilege escalation via arbitrary code execution in Microsoft Windows Resilient File System (ReFS) affects a broad range of Windows 10, Windows 11, and Windows Server (2016-2025) builds. An authorized (low-privileged) attacker who can trigger the vulnerable heap allocation path can corrupt heap memory (CWE-122) to run code in the security context of the ReFS driver, yielding full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and the flaw is not on the CISA KEV list.

Local code execution in Microsoft Windows NTFS (New Technology File System) stems from a heap-based buffer overflow (CWE-122) that lets a local attacker run arbitrary code with high confidentiality, integrity, and availability impact. The flaw affects a broad range of Windows client and server builds - from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025 - and Microsoft has released a patch. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but NTFS's role as the default Windows filesystem makes the exposed surface extremely wide.

Remote code execution in Microsoft Active Directory Domain Services (AD DS) allows an authenticated network attacker to run arbitrary code on domain controllers by triggering a heap-based buffer overflow (CWE-122). Affected platforms span Windows Server 2012 through 2025 (including Server Core) and Windows 10/11 clients acting in AD roles, with Microsoft-issued patches available. There is no public exploit identified at time of analysis and it is not on CISA KEV, but the CVSS 8.8 rating and the sensitivity of the domain-controller attack surface make this a high-priority patch.

Remote code execution in the Microsoft Windows DHCP Server role allows an authenticated network attacker (PR:L) to trigger a heap-based buffer overflow and run arbitrary code on the server. The flaw affects DHCP Server across Windows Server 2012 through Server 2025 (including Server Core installations) and carries a CVSS 8.8 with full confidentiality, integrity, and availability impact. Reported by Microsoft with a vendor patch available; no public exploit identified at time of analysis.

Local code execution in Microsoft Windows NTFS driver allows an authenticated attacker to run arbitrary code by triggering a heap-based buffer overflow (CWE-122) after inducing user interaction. The flaw affects a broad range of Windows client and server releases, from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. It was reported by Microsoft, a vendor patch is available, and there is no public exploit identified at time of analysis.

Local arbitrary code execution in Microsoft Excel arises from a heap-based buffer overflow (CWE-122) triggered when a user opens a maliciously crafted spreadsheet; successful exploitation runs attacker code in the context of the current user across desktop Office builds (Excel 2016, Office 2019, LTSC 2021/2024, Microsoft 365 Apps) on both Windows and Mac, as well as Office Online Server. The flaw carries CVSS 7.8 with high confidentiality, integrity, and availability impact but requires user interaction (opening the file). No public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available from Microsoft.

Local code execution in Microsoft Windows Media Foundation lets an attacker run arbitrary code in the context of the victim after luring them to open a maliciously crafted media file. The flaw (CVE-2026-58610, CWE-122 heap-based buffer overflow) affects a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. CVSS is 7.8 (AV:L/AC:L/PR:N/UI:R) with full confidentiality, integrity, and availability impact; there is no public exploit identified at time of analysis and it is not on CISA KEV.

Local privilege escalation in the Windows Virtual Hard Disk (VHD) Miniport Driver lets an authenticated low-privileged user corrupt kernel heap memory and gain SYSTEM-level control. The flaw (CWE-122 heap-based buffer overflow, CVSS 7.8) affects a broad range of Windows 10, Windows 11, and Windows Server builds and was reported by Microsoft. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.