CVE-2026-83949: CWE-126: Buffer Over-read in Microsoft Microsoft 365 Apps for Enterprise
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-83949) involves a buffer over-read in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally by reading beyond the intended buffer boundaries. The CVSS 3.1 vector indicates local attack vector, low attack complexity, no privileges required, user interaction required, and high confidentiality impact without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can locally disclose sensitive information due to the buffer over-read flaw. There is no impact on integrity or availability. The vulnerability requires local access and user interaction to exploit.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83949 for update and patch deployment details.
CVE-2026-83949: CWE-126: Buffer Over-read in Microsoft Microsoft 365 Apps for Enterprise
Description
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-83949) involves a buffer over-read in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally by reading beyond the intended buffer boundaries. The CVSS 3.1 vector indicates local attack vector, low attack complexity, no privileges required, user interaction required, and high confidentiality impact without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can locally disclose sensitive information due to the buffer over-read flaw. There is no impact on integrity or availability. The vulnerability requires local access and user interaction to exploit.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83949 for update and patch deployment details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-31T23:40:59.641Z
- 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-2026-83949","vendor":"Microsoft"}]
Threat ID: 6aa04575acd9273b49fbbba3
Added to database: 09/08/2026, 17:27:17 UTC
Last enriched: 09/08/2026, 17:55:10 UTC
Last updated: 09/08/2026, 21:23:29 UTC
Views: 4
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