CVE-2026-88153: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
CVE-2026-88153 is an out-of-bounds read vulnerability in Microsoft Office Excel within Microsoft 365 Apps for Enterprise. This flaw allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. An official fix is available from Microsoft.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Microsoft 365 Apps for Enterprise
Microsoft
Microsoft Office LTSC 2021
Microsoft
Microsoft Office LTSC 2024
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-88153 is a vulnerability classified as CWE-125 (Out-of-bounds Read) affecting Microsoft Office Excel in Microsoft 365 Apps for Enterprise. It allows an unauthorized attacker to cause an out-of-bounds read, potentially leading to information disclosure over a network. The vulnerability requires user interaction but no privileges and has a medium attack complexity. Microsoft has published an official fix for this issue.
Potential Impact
The vulnerability can lead to unauthorized information disclosure over a network without requiring privileges. It does not impact integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88153. No additional mitigation actions are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:58:19.186Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88153","vendor":"Microsoft"}]
Threat ID: 6ace85612cdf04f6569ff911
Added to database: 10/13/2026, 19:24:17 UTC
Last enriched: 10/14/2026, 01:33:58 UTC
Last updated: 10/14/2026, 01:33:58 UTC
Views: 3
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