Microsoft Excel 2016
Monthly
Remote code execution via use-after-free in Microsoft Excel affects multiple product lines including Microsoft 365 Apps for Enterprise, Excel 2016, and Office 2019/LTSC 2021/LTSC 2024. An unauthenticated remote attacker can exploit this memory corruption flaw by convincing a target user to open a specially crafted Excel workbook, resulting in arbitrary code execution under the context of the victim process. No public exploit code has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog, though the low-complexity, no-privilege network attack vector makes it an attractive phishing payload candidate.
Local code execution in Microsoft Office Excel (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) allows an attacker to run arbitrary code in the context of the current user when a victim opens a maliciously crafted spreadsheet. The flaw stems from use of an uninitialized resource (CWE-908) and carries a CVSS 7.8; it requires user interaction (opening the file) and no prior privileges. No public exploit identified at time of analysis, and it is not listed in CISA KEV, but a vendor patch is available.
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.
Information disclosure in Microsoft Excel (across Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) lets an attacker read out-of-bounds heap memory when a victim opens a maliciously crafted spreadsheet, potentially leaking sensitive process memory. The flaw (CWE-125, CVSS 7.1) requires local user interaction and no privileges, but is not remotely triggerable without the user opening the file. There is no public exploit identified at time of analysis, EPSS is low at 0.30%, and CISA SSVC rates exploitation as none.
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.
Information disclosure in Microsoft Office Excel (2016, Office 2019, LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) lets an attacker read out-of-bounds memory when a victim opens a maliciously crafted spreadsheet, potentially leaking sensitive process data such as memory contents, pointers, or credentials. Rated CVSS 7.1 with a local attack vector requiring user interaction, the flaw stems from a CWE-125 out-of-bounds read in Excel's file parser. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the ubiquity of Excel and Microsoft's confirmed patch make prompt patching important.
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.
Local code execution in Microsoft Office Excel (Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, Office for Mac, Office Online Server) arises from an out-of-bounds read (CWE-125) that an attacker weaponizes by luring a victim into opening a crafted spreadsheet, yielding code execution in the user's security context. The flaw carries a CVSS 7.8 (AV:L/AC:L/PR:N/UI:R) and requires no privileges but does require user interaction. Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
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.
Out-of-bounds read in Microsoft Excel's file parser discloses sensitive memory contents when a victim opens a specially crafted workbook, affecting Excel 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, Office 365 for Mac, Office LTSC for Mac 2021/2024, and Office Online Server. The CVSS vector (AV:N/PR:N/UI:R/C:H) indicates unauthenticated network delivery with mandatory user interaction and high confidentiality impact. No public exploit identified at time of analysis; SSVC confirms no known active exploitation and EPSS at 0.64% (46th percentile) reflects below-average exploitation probability, positioning this as a targeted phishing risk rather than an opportunistic threat.
Local code execution in Microsoft Excel (Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) arises from an out-of-bounds read (CWE-125) triggered when a victim opens a maliciously crafted spreadsheet. CVSS 7.8 with high impact to confidentiality, integrity, and availability; no public exploit identified at time of analysis. Exploitation requires user interaction (opening the file) but no prior authentication or privileges on the target beyond the ability to induce the user to open the document.
Local arbitrary code execution in Microsoft Excel arises from a buffer over-read (CWE-126) triggered when a victim opens a maliciously crafted spreadsheet, letting an attacker run code in the context of the current user. The flaw spans Office 2016/2019, Microsoft 365 Apps, Office LTSC 2021/2024 (Windows and Mac) and Office Online Server; a vendor patch is available via MSRC. No public exploit has been identified at time of analysis, and the CVSS 7.8 (AV:L/UI:R) rating reflects that user interaction is required.
Local code execution in Microsoft Excel (and the broader Office 2016/2019/LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server family) results from a stack-based buffer overflow triggered when a victim opens a maliciously crafted spreadsheet. An attacker who convinces a user to open a booby-trapped file can run arbitrary code in the context of that user, with full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and it is not on CISA KEV, but the ubiquity of Excel and Microsoft's own advisory make this a routine patch-Tuesday-class priority.
Arbitrary local code execution in Microsoft Office Excel (spanning Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the Office for Mac editions, and Office Online Server) lets an attacker run code in the current user's context when a victim opens a maliciously crafted spreadsheet. The flaw is an untrusted pointer dereference (CWE-822) triggered during file parsing; it requires user interaction but no prior privileges. No public exploit is identified at time of analysis, and a vendor patch is available from Microsoft (MSRC).
Untrusted pointer dereference (CWE-822) in Microsoft Excel allows a local attacker to disclose sensitive memory contents when a victim opens a specially crafted workbook. The flaw affects a broad swath of Microsoft Office product lines - from Excel 2016 through Office LTSC 2024 and their Mac counterparts - as confirmed by CPE enumeration. No public exploit code or active exploitation has been identified at time of analysis; SSVC rates exploitation as none and technical impact as partial, placing this in the moderate real-world priority tier despite the C:H CVSS rating.
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 code execution in Microsoft Excel (and the broader Office suite through Microsoft 365 Apps, Office 2019/2021/2024 LTSC, Office for Mac, and Office Online Server) arises from an integer underflow (CWE-191) in Excel's file parsing, letting an attacker run arbitrary code in the context of the user who opens a maliciously crafted spreadsheet. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R) shows no attacker privileges are needed but the victim must open the file, giving full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available.
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 Excel (spanning Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the macOS Office builds, and Office Online Server) arises from an integer overflow (CWE-190) triggered when the application parses a maliciously crafted spreadsheet. An unauthorized attacker who convinces a victim to open a booby-trapped file can run arbitrary code in the context of the current user, with full confidentiality, integrity, and availability impact per the 7.8 CVSS vector. 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 (spanning Excel 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, the macOS builds, and Office Online Server) arises from an out-of-bounds read (CWE-125) that an attacker triggers by convincing a user to open a maliciously crafted workbook. The CVSS 3.1 base score is 7.8 with high confidentiality, integrity, and availability impact, but exploitation requires user interaction (opening the file) and no active exploitation or public proof-of-concept has been reported. There is no public exploit identified at time of analysis; Microsoft has released a patch via its Security Update Guide.
Local code execution in Microsoft Excel (Microsoft 365 Apps, Office 2019/LTSC 2021/2024, Office for Mac, and Office Online Server) arises from a type-confusion flaw (CWE-843) in how Excel parses spreadsheet content. An attacker who convinces a victim to open a malicious workbook can run arbitrary code in the context of the current user, gaining high confidentiality, integrity, and availability impact. Reported by Microsoft with a patch available; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Out-of-bounds read in Microsoft Excel's file parsing engine exposes sensitive memory contents when a victim opens a specially crafted workbook, affecting Excel 2016 through Office LTSC 2024 and Office Online Server across both Windows and macOS platforms. The CVSS vector (AV:L/UI:R/C:H/I:N/A:N) confirms impact is limited to confidentiality loss - no code execution results - and requires local user interaction to trigger. No public exploit has been identified and CISA has not listed this in KEV; with an EPSS of 0.46% and SSVC exploitation status of none, this is appropriate for standard patch cycle prioritization rather than emergency response.
Out-of-bounds read in Microsoft Excel and related Office products exposes adjacent process memory to local information disclosure when a user opens a specially crafted spreadsheet file. The flaw spans a broad set of Microsoft Office versions across Windows and macOS - including Excel 2016, Office 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and Office Online Server - with vendor-released patches now available for all affected builds. No active exploitation has been confirmed by CISA KEV, and EPSS places exploitation probability at 0.35% (27th percentile), consistent with SSVC's assessment of no current exploitation and non-automatable delivery.
Local code execution in Microsoft Excel (Office 2016 through LTSC 2024, Microsoft 365 Apps, and Mac editions) allows an attacker to run arbitrary code by tricking a user into opening a maliciously crafted spreadsheet that triggers a type-confusion condition in Excel's file parser. The CVSS 3.1 score is 7.8 (High) with the local vector reflecting file-open exploitation rather than remote-network access, and success requires user interaction. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Untrusted pointer dereference in Microsoft Excel exposes sensitive in-process memory to a local attacker across virtually the entire Office product family - Excel 2016 through Office LTSC 2024 on Windows and macOS, plus Office Online Server. An attacker must deliver a crafted spreadsheet and induce the victim to open it; successful exploitation yields high confidentiality impact with no integrity or availability effect. No public exploit code or active exploitation has been identified; EPSS at 0.46% (37th percentile) and SSVC exploitation status of 'none' are consistent with low real-world risk at this time.
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 Excel (2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) arises from a use-after-free memory corruption (CWE-416) that an attacker triggers when a victim opens a maliciously crafted spreadsheet. Exploitation runs code in the context of the current user and requires user interaction (opening the file), with no public exploit identified at time of analysis. This is a locally-exploited, phishing-delivered class of bug typical of Office file-format handlers, patched by Microsoft via MSRC.
Local code execution in Microsoft Excel (and the broader Office family through Microsoft 365 Apps, Office 2019/2021/2024 LTSC, Office for Mac, and Office Online Server) arises from a stack-based buffer overflow (CWE-121) triggered when a user opens a maliciously crafted spreadsheet. An attacker who convinces a victim to open the file runs arbitrary code in the security context of the current user, with high impact to confidentiality, integrity, and availability. There is no public exploit identified at time of analysis and the vulnerability is not listed in CISA KEV; Microsoft has released a patch.
Out-of-bounds read in Microsoft Excel's spreadsheet parser (CWE-125) exposes affected systems to both local information disclosure and application crash when a victim opens a specially crafted file, spanning Excel 2016 through Office LTSC 2024 and Office 365 for Mac. The CVSS vector (AV:L/UI:R/A:H) reveals that while the CVE description emphasizes information disclosure, the primary real-world impact is application availability - the invalid memory read can crash Excel (A:H), with incidental memory content leakage (C:L) as a secondary effect. No public exploit code has been identified at time of analysis and CISA SSVC assigns exploitation status of none, consistent with a low EPSS score of 0.31% at the 23rd percentile.
Heap-based buffer overflow in Microsoft Office Excel triggers a local information disclosure when a target user opens a maliciously crafted document. Affecting Excel 2016 through Office LTSC 2024 and Microsoft 365 Apps for Enterprise on both Windows and macOS, the vulnerability yields only limited confidentiality impact (C:L) with no integrity or availability consequence, placing it in the Low severity tier at CVSS 3.3. No public exploit code exists and no active exploitation has been confirmed - CISA's SSVC framework rates exploitation as none, automatable as no, and technical impact as partial, consistent with the low EPSS probability of 0.27% (19th percentile).
Local code execution in Microsoft Excel (including Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, and Office for Mac) arises from a heap-based buffer overflow (CWE-122) triggered when a victim opens a maliciously crafted spreadsheet, letting an attacker run arbitrary code in the user's context. The CVSS 3.1 score is 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting that exploitation needs user interaction but no prior privileges once the file is opened. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; Microsoft has released a patch.
Arbitrary code execution in Microsoft Excel (and the broader Office family through Microsoft 365 Apps, Office 2019, LTSC 2021/2024, Office for Mac, and Office Online Server) is possible when a user opens a maliciously crafted spreadsheet that triggers a heap-based buffer overflow (CWE-122), running attacker code in the context of the current user. There is no public exploit identified at time of analysis and the EPSS probability is very low (0.06%, 18th percentile), but the technical impact is total (full confidentiality, integrity, and availability loss). Microsoft has released patches; exploitation requires the victim to open a file, so it is a phishing/social-engineering-driven local vulnerability rather than a remotely wormable one.
Local code execution in Microsoft Office Excel (Excel 2016, Office 2019/LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) arises from a use-after-free memory corruption flaw that an attacker triggers by convincing a user to open a specially crafted spreadsheet. Successful exploitation yields full compromise of the current user's context (high confidentiality, integrity, and availability impact). There is no public exploit identified at time of analysis, EPSS is very low (0.06%), and CISA SSVC records exploitation status as none, indicating this is a patch-in-cycle issue rather than an active threat.
Information disclosure in Microsoft Excel (and the broader Office family - Office 2019, Office LTSC 2021/2024, Office for Mac, Microsoft 365 Apps for Enterprise, and Office Online Server) allows an attacker to read memory beyond an allocated buffer when a victim opens a crafted spreadsheet, potentially leaking sensitive in-process data. Exploitation is local and requires user interaction (opening the malicious file); there is no public exploit identified at time of analysis and CISA SSVC scores exploitation as 'none'. EPSS is very low (0.06%, 18th percentile), indicating negligible observed exploitation activity, though the technical impact is rated 'total'.
Remote code execution via use-after-free in Microsoft Excel affects multiple product lines including Microsoft 365 Apps for Enterprise, Excel 2016, and Office 2019/LTSC 2021/LTSC 2024. An unauthenticated remote attacker can exploit this memory corruption flaw by convincing a target user to open a specially crafted Excel workbook, resulting in arbitrary code execution under the context of the victim process. No public exploit code has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog, though the low-complexity, no-privilege network attack vector makes it an attractive phishing payload candidate.
Local code execution in Microsoft Office Excel (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) allows an attacker to run arbitrary code in the context of the current user when a victim opens a maliciously crafted spreadsheet. The flaw stems from use of an uninitialized resource (CWE-908) and carries a CVSS 7.8; it requires user interaction (opening the file) and no prior privileges. No public exploit identified at time of analysis, and it is not listed in CISA KEV, but a vendor patch is available.
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.
Information disclosure in Microsoft Excel (across Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) lets an attacker read out-of-bounds heap memory when a victim opens a maliciously crafted spreadsheet, potentially leaking sensitive process memory. The flaw (CWE-125, CVSS 7.1) requires local user interaction and no privileges, but is not remotely triggerable without the user opening the file. There is no public exploit identified at time of analysis, EPSS is low at 0.30%, and CISA SSVC rates exploitation as none.
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.
Information disclosure in Microsoft Office Excel (2016, Office 2019, LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) lets an attacker read out-of-bounds memory when a victim opens a maliciously crafted spreadsheet, potentially leaking sensitive process data such as memory contents, pointers, or credentials. Rated CVSS 7.1 with a local attack vector requiring user interaction, the flaw stems from a CWE-125 out-of-bounds read in Excel's file parser. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the ubiquity of Excel and Microsoft's confirmed patch make prompt patching important.
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.
Local code execution in Microsoft Office Excel (Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, Office for Mac, Office Online Server) arises from an out-of-bounds read (CWE-125) that an attacker weaponizes by luring a victim into opening a crafted spreadsheet, yielding code execution in the user's security context. The flaw carries a CVSS 7.8 (AV:L/AC:L/PR:N/UI:R) and requires no privileges but does require user interaction. Microsoft has released a patch; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
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.
Out-of-bounds read in Microsoft Excel's file parser discloses sensitive memory contents when a victim opens a specially crafted workbook, affecting Excel 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, Office 365 for Mac, Office LTSC for Mac 2021/2024, and Office Online Server. The CVSS vector (AV:N/PR:N/UI:R/C:H) indicates unauthenticated network delivery with mandatory user interaction and high confidentiality impact. No public exploit identified at time of analysis; SSVC confirms no known active exploitation and EPSS at 0.64% (46th percentile) reflects below-average exploitation probability, positioning this as a targeted phishing risk rather than an opportunistic threat.
Local code execution in Microsoft Excel (Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, Office for Mac, and Office Online Server) arises from an out-of-bounds read (CWE-125) triggered when a victim opens a maliciously crafted spreadsheet. CVSS 7.8 with high impact to confidentiality, integrity, and availability; no public exploit identified at time of analysis. Exploitation requires user interaction (opening the file) but no prior authentication or privileges on the target beyond the ability to induce the user to open the document.
Local arbitrary code execution in Microsoft Excel arises from a buffer over-read (CWE-126) triggered when a victim opens a maliciously crafted spreadsheet, letting an attacker run code in the context of the current user. The flaw spans Office 2016/2019, Microsoft 365 Apps, Office LTSC 2021/2024 (Windows and Mac) and Office Online Server; a vendor patch is available via MSRC. No public exploit has been identified at time of analysis, and the CVSS 7.8 (AV:L/UI:R) rating reflects that user interaction is required.
Local code execution in Microsoft Excel (and the broader Office 2016/2019/LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server family) results from a stack-based buffer overflow triggered when a victim opens a maliciously crafted spreadsheet. An attacker who convinces a user to open a booby-trapped file can run arbitrary code in the context of that user, with full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and it is not on CISA KEV, but the ubiquity of Excel and Microsoft's own advisory make this a routine patch-Tuesday-class priority.
Arbitrary local code execution in Microsoft Office Excel (spanning Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the Office for Mac editions, and Office Online Server) lets an attacker run code in the current user's context when a victim opens a maliciously crafted spreadsheet. The flaw is an untrusted pointer dereference (CWE-822) triggered during file parsing; it requires user interaction but no prior privileges. No public exploit is identified at time of analysis, and a vendor patch is available from Microsoft (MSRC).
Untrusted pointer dereference (CWE-822) in Microsoft Excel allows a local attacker to disclose sensitive memory contents when a victim opens a specially crafted workbook. The flaw affects a broad swath of Microsoft Office product lines - from Excel 2016 through Office LTSC 2024 and their Mac counterparts - as confirmed by CPE enumeration. No public exploit code or active exploitation has been identified at time of analysis; SSVC rates exploitation as none and technical impact as partial, placing this in the moderate real-world priority tier despite the C:H CVSS rating.
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 code execution in Microsoft Excel (and the broader Office suite through Microsoft 365 Apps, Office 2019/2021/2024 LTSC, Office for Mac, and Office Online Server) arises from an integer underflow (CWE-191) in Excel's file parsing, letting an attacker run arbitrary code in the context of the user who opens a maliciously crafted spreadsheet. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R) shows no attacker privileges are needed but the victim must open the file, giving full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and it is not listed in CISA KEV; a vendor patch is available.
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 Excel (spanning Microsoft 365 Apps for Enterprise, Excel 2016, Office 2019, Office LTSC 2021/2024, the macOS Office builds, and Office Online Server) arises from an integer overflow (CWE-190) triggered when the application parses a maliciously crafted spreadsheet. An unauthorized attacker who convinces a victim to open a booby-trapped file can run arbitrary code in the context of the current user, with full confidentiality, integrity, and availability impact per the 7.8 CVSS vector. 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 (spanning Excel 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, the macOS builds, and Office Online Server) arises from an out-of-bounds read (CWE-125) that an attacker triggers by convincing a user to open a maliciously crafted workbook. The CVSS 3.1 base score is 7.8 with high confidentiality, integrity, and availability impact, but exploitation requires user interaction (opening the file) and no active exploitation or public proof-of-concept has been reported. There is no public exploit identified at time of analysis; Microsoft has released a patch via its Security Update Guide.
Local code execution in Microsoft Excel (Microsoft 365 Apps, Office 2019/LTSC 2021/2024, Office for Mac, and Office Online Server) arises from a type-confusion flaw (CWE-843) in how Excel parses spreadsheet content. An attacker who convinces a victim to open a malicious workbook can run arbitrary code in the context of the current user, gaining high confidentiality, integrity, and availability impact. Reported by Microsoft with a patch available; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Out-of-bounds read in Microsoft Excel's file parsing engine exposes sensitive memory contents when a victim opens a specially crafted workbook, affecting Excel 2016 through Office LTSC 2024 and Office Online Server across both Windows and macOS platforms. The CVSS vector (AV:L/UI:R/C:H/I:N/A:N) confirms impact is limited to confidentiality loss - no code execution results - and requires local user interaction to trigger. No public exploit has been identified and CISA has not listed this in KEV; with an EPSS of 0.46% and SSVC exploitation status of none, this is appropriate for standard patch cycle prioritization rather than emergency response.
Out-of-bounds read in Microsoft Excel and related Office products exposes adjacent process memory to local information disclosure when a user opens a specially crafted spreadsheet file. The flaw spans a broad set of Microsoft Office versions across Windows and macOS - including Excel 2016, Office 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and Office Online Server - with vendor-released patches now available for all affected builds. No active exploitation has been confirmed by CISA KEV, and EPSS places exploitation probability at 0.35% (27th percentile), consistent with SSVC's assessment of no current exploitation and non-automatable delivery.
Local code execution in Microsoft Excel (Office 2016 through LTSC 2024, Microsoft 365 Apps, and Mac editions) allows an attacker to run arbitrary code by tricking a user into opening a maliciously crafted spreadsheet that triggers a type-confusion condition in Excel's file parser. The CVSS 3.1 score is 7.8 (High) with the local vector reflecting file-open exploitation rather than remote-network access, and success requires user interaction. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Untrusted pointer dereference in Microsoft Excel exposes sensitive in-process memory to a local attacker across virtually the entire Office product family - Excel 2016 through Office LTSC 2024 on Windows and macOS, plus Office Online Server. An attacker must deliver a crafted spreadsheet and induce the victim to open it; successful exploitation yields high confidentiality impact with no integrity or availability effect. No public exploit code or active exploitation has been identified; EPSS at 0.46% (37th percentile) and SSVC exploitation status of 'none' are consistent with low real-world risk at this time.
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 Excel (2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) arises from a use-after-free memory corruption (CWE-416) that an attacker triggers when a victim opens a maliciously crafted spreadsheet. Exploitation runs code in the context of the current user and requires user interaction (opening the file), with no public exploit identified at time of analysis. This is a locally-exploited, phishing-delivered class of bug typical of Office file-format handlers, patched by Microsoft via MSRC.
Local code execution in Microsoft Excel (and the broader Office family through Microsoft 365 Apps, Office 2019/2021/2024 LTSC, Office for Mac, and Office Online Server) arises from a stack-based buffer overflow (CWE-121) triggered when a user opens a maliciously crafted spreadsheet. An attacker who convinces a victim to open the file runs arbitrary code in the security context of the current user, with high impact to confidentiality, integrity, and availability. There is no public exploit identified at time of analysis and the vulnerability is not listed in CISA KEV; Microsoft has released a patch.
Out-of-bounds read in Microsoft Excel's spreadsheet parser (CWE-125) exposes affected systems to both local information disclosure and application crash when a victim opens a specially crafted file, spanning Excel 2016 through Office LTSC 2024 and Office 365 for Mac. The CVSS vector (AV:L/UI:R/A:H) reveals that while the CVE description emphasizes information disclosure, the primary real-world impact is application availability - the invalid memory read can crash Excel (A:H), with incidental memory content leakage (C:L) as a secondary effect. No public exploit code has been identified at time of analysis and CISA SSVC assigns exploitation status of none, consistent with a low EPSS score of 0.31% at the 23rd percentile.
Heap-based buffer overflow in Microsoft Office Excel triggers a local information disclosure when a target user opens a maliciously crafted document. Affecting Excel 2016 through Office LTSC 2024 and Microsoft 365 Apps for Enterprise on both Windows and macOS, the vulnerability yields only limited confidentiality impact (C:L) with no integrity or availability consequence, placing it in the Low severity tier at CVSS 3.3. No public exploit code exists and no active exploitation has been confirmed - CISA's SSVC framework rates exploitation as none, automatable as no, and technical impact as partial, consistent with the low EPSS probability of 0.27% (19th percentile).
Local code execution in Microsoft Excel (including Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, and Office for Mac) arises from a heap-based buffer overflow (CWE-122) triggered when a victim opens a maliciously crafted spreadsheet, letting an attacker run arbitrary code in the user's context. The CVSS 3.1 score is 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting that exploitation needs user interaction but no prior privileges once the file is opened. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV; Microsoft has released a patch.
Arbitrary code execution in Microsoft Excel (and the broader Office family through Microsoft 365 Apps, Office 2019, LTSC 2021/2024, Office for Mac, and Office Online Server) is possible when a user opens a maliciously crafted spreadsheet that triggers a heap-based buffer overflow (CWE-122), running attacker code in the context of the current user. There is no public exploit identified at time of analysis and the EPSS probability is very low (0.06%, 18th percentile), but the technical impact is total (full confidentiality, integrity, and availability loss). Microsoft has released patches; exploitation requires the victim to open a file, so it is a phishing/social-engineering-driven local vulnerability rather than a remotely wormable one.
Local code execution in Microsoft Office Excel (Excel 2016, Office 2019/LTSC 2021/2024, Microsoft 365 Apps, Office for Mac, and Office Online Server) arises from a use-after-free memory corruption flaw that an attacker triggers by convincing a user to open a specially crafted spreadsheet. Successful exploitation yields full compromise of the current user's context (high confidentiality, integrity, and availability impact). There is no public exploit identified at time of analysis, EPSS is very low (0.06%), and CISA SSVC records exploitation status as none, indicating this is a patch-in-cycle issue rather than an active threat.
Information disclosure in Microsoft Excel (and the broader Office family - Office 2019, Office LTSC 2021/2024, Office for Mac, Microsoft 365 Apps for Enterprise, and Office Online Server) allows an attacker to read memory beyond an allocated buffer when a victim opens a crafted spreadsheet, potentially leaking sensitive in-process data. Exploitation is local and requires user interaction (opening the malicious file); there is no public exploit identified at time of analysis and CISA SSVC scores exploitation as 'none'. EPSS is very low (0.06%, 18th percentile), indicating negligible observed exploitation activity, though the technical impact is rated 'total'.