CVE-2026-20946: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability is an out-of-bounds read in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise (version 16.0.1). It allows an unauthorized attacker to execute code locally by exploiting improper memory handling. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Exploitation requires local access with low attack complexity, no privileges, and user interaction. The vendor has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation could lead to local code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow an attacker to run arbitrary code under the context of the user running Excel. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. Users and administrators should apply the official Microsoft update for Microsoft 365 Apps for Enterprise version 16.0.1 to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-20946: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is an out-of-bounds read in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise (version 16.0.1). It allows an unauthorized attacker to execute code locally by exploiting improper memory handling. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Exploitation requires local access with low attack complexity, no privileges, and user interaction. The vendor has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation could lead to local code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow an attacker to run arbitrary code under the context of the user running Excel. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. Users and administrators should apply the official Microsoft update for Microsoft 365 Apps for Enterprise version 16.0.1 to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.339Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae5a60475309f9ae22c
Added to database: 1/13/2026, 6:11:49 PM
Last enriched: 4/3/2026, 12:51:31 PM
Last updated: 5/8/2026, 10:36:17 AM
Views: 98
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