CVE-2026-55142: CWE-197: Numeric Truncation Error in Microsoft Microsoft 365 Apps for Enterprise
Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves a numeric truncation error (CWE-197) in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It allows an unauthorized attacker to cause local information disclosure. The CVSS 3.1 vector indicates the attack requires local access with low complexity and no privileges, but user interaction is required. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information on the affected system. There is no impact on integrity or availability. No known active exploitation has been reported.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Apps for Enterprise are updated according to Microsoft's guidance available at the official advisory URL.
CVE-2026-55142: CWE-197: Numeric Truncation Error in Microsoft Microsoft 365 Apps for Enterprise
Description
Numeric truncation error 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 involves a numeric truncation error (CWE-197) in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It allows an unauthorized attacker to cause local information disclosure. The CVSS 3.1 vector indicates the attack requires local access with low complexity and no privileges, but user interaction is required. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information on the affected system. There is no impact on integrity or availability. No known active exploitation has been reported.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Apps for Enterprise are updated according to Microsoft's guidance available at the official advisory URL.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T15:03:49.682Z
- 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-2026-55142","vendor":"Microsoft"}]
Threat ID: 6a5676b868715ace43f0aba2
Added to database: 07/14/2026, 17:49:44 UTC
Last enriched: 08/13/2026, 15:42:35 UTC
Last updated: 08/28/2026, 22:52:12 UTC
Views: 53
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.