CVE-2026-40360: 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 disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40360) involves an out-of-bounds read (CWE-125) in Microsoft Office Excel as part of Microsoft 365 Apps for Enterprise version 16.0.1. It enables unauthorized local information disclosure. The CVSS 3.1 vector indicates low attack complexity, no privileges required, but user interaction is needed. Confidentiality, integrity, and availability impacts are all rated high. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information locally. The vulnerability affects confidentiality, integrity, and availability with high impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since Microsoft 365 Apps for Enterprise is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure their software is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40360 to receive the fix.
CVE-2026-40360: 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 disclose information locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40360) involves an out-of-bounds read (CWE-125) in Microsoft Office Excel as part of Microsoft 365 Apps for Enterprise version 16.0.1. It enables unauthorized local information disclosure. The CVSS 3.1 vector indicates low attack complexity, no privileges required, but user interaction is needed. Confidentiality, integrity, and availability impacts are all rated high. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information locally. The vulnerability affects confidentiality, integrity, and availability with high impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since Microsoft 365 Apps for Enterprise is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure their software is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40360 to receive the fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-11T23:06:15.614Z
- 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-2026-40360","vendor":"Microsoft"}]
Threat ID: 6a03654ccbff5d861008c821
Added to database: 5/12/2026, 5:37:16 PM
Last enriched: 5/12/2026, 6:53:53 PM
Last updated: 5/13/2026, 4:58:40 AM
Views: 2
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