Skip to main content

Severity by source

Vendor (microsoft) PRIMARY
HIGH
qualitative
NVD
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

Requires an existing low-privileged local account (AV:L, PR:L) with no user interaction; kernel-mode code execution yields total confidentiality, integrity, and availability impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Updated
Jul 17, 2026 - 02:43 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 17, 2026 - 02:37 vuln.today
cvss_changed
CVSS changed
Jul 17, 2026 - 02:37 NVD
7.3 (HIGH) 7.8 (HIGH)
Analysis Generated
Jul 14, 2026 - 17:47 vuln.today
CVE Published
Jul 14, 2026 - 17:05 nvd
HIGH 7.3

DescriptionNVD

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

AnalysisAI

Local privilege escalation via a heap-based buffer overflow in the Windows NTFS driver allows an authenticated attacker with low privileges to execute arbitrary code and gain full SYSTEM-level control. It 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. No public exploit identified at time of analysis, and SSVC records no observed exploitation; EPSS is low at 0.29% (21st percentile).

Technical ContextAI

The flaw resides in NTFS, the default file system driver in Windows, which runs in kernel mode and parses on-disk metadata structures. CWE-122 (heap-based buffer overflow) indicates that NTFS allocates a heap buffer and then writes past its bounds, likely while processing attacker-influenced file system data or structures. Because the corruption occurs in a kernel-mode component, successful exploitation can overwrite adjacent heap objects and ultimately hijack kernel control flow, yielding code execution at the highest privilege level. The CPE data confirms the affected component is Microsoft Windows across a wide matrix of client (Windows 10 1607/1809/21H2/22H2, Windows 11 23H2/24H2/25H2/26H1) and server (Server 2012/2012 R2/2016/2019/2022/2025, including Server Core) editions.

RemediationAI

Apply the Microsoft security update for your specific Windows build, as a vendor-released patch is available; the fixed builds are the versions listed in the advisory (for example 10.0.26100.8875 for Windows 11 24H2/25H2, 10.0.19045.7548 for Windows 10 22H2, 10.0.20348.5386 for Windows Server 2022, and 10.0.26100.33158 for Windows Server 2025), obtained through Windows Update or from the MSRC guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58640. Because this is a kernel/file-system driver flaw with no configurable feature to disable, there is no clean product-level workaround; until patching, reduce risk by limiting who can obtain interactive or local low-privilege access to affected hosts, enforcing least privilege and strong endpoint controls, and prioritizing multi-user and server systems where untrusted local accounts exist - recognizing these are compensating controls that reduce opportunity but do not remove the vulnerability.

CVE-2026-33824 CRITICAL POC
9.8 Apr 14

Remote code execution in Windows IKE Extension (Internet Key Exchange) via double free memory corruption allows unauthen

CVE-2026-56155 HIGH POC
7.8 Jul 14

Local privilege escalation in Microsoft Active Directory Federation Services (AD FS) lets an already-authenticated low-p

CVE-2026-32202 MEDIUM POC
4.3 Apr 14

Windows Shell protection mechanism failure (CVE-2026-32202) allows remote attackers to perform spoofing attacks over a n

CVE-2026-49798 CRITICAL POC
9.3 Jul 14

Local privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-leve

CVE-2026-54128 HIGH POC
8.4 Jul 14

Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw aff

CVE-2026-50518 CRITICAL
9.8 Jul 14

Remote code execution in the Microsoft Windows DHCP Server role allows an unauthenticated network attacker to run arbitr

CVE-2026-50655 HIGH POC
7.8 Jul 14

Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 throug

CVE-2026-54992 HIGH POC
7.8 Jul 14

Local privilege escalation via heap-based buffer overflow in the Windows Message Queuing (MSMQ) Queue Manager component

CVE-2026-50489 HIGH POC
7.8 Jul 14

Local privilege escalation in Microsoft Windows Win32K lets an authenticated low-privileged user corrupt kernel heap mem

CVE-2026-50667 HIGH POC
7.0 Jul 14

Local privilege escalation in the Windows NTFS file system driver lets an authenticated low-privileged user win a race c

CVE-2026-57092 CRITICAL
9.9 Jul 14

Elevation of privilege in the Windows Hyper-V virtual network switch (VMSwitch) lets an authenticated attacker operating

CVE-2026-56190 CRITICAL
9.8 Jul 14

Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary

Share

CVE-2026-58640 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy