CVE-2026-55057: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft 365 Apps for Enterprise
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound in Microsoft 365 Apps for Enterprise, which can be exploited by an unauthorized local attacker to disclose information. The issue is tracked as CWE-190. The vulnerability affects version 16.0.1 of the product. Microsoft has published an official fix and manages remediation for this cloud service. No active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could lead to unauthorized local information disclosure. There is no impact on integrity or availability. The attack complexity is low, and no privileges are required, but user interaction is needed.
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 apply the official update as directed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55057 to mitigate this vulnerability.
CVE-2026-55057: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft 365 Apps for Enterprise
Description
Integer overflow or wraparound in Microsoft Office 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 an integer overflow or wraparound in Microsoft 365 Apps for Enterprise, which can be exploited by an unauthorized local attacker to disclose information. The issue is tracked as CWE-190. The vulnerability affects version 16.0.1 of the product. Microsoft has published an official fix and manages remediation for this cloud service. No active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could lead to unauthorized local information disclosure. There is no impact on integrity or availability. The attack complexity is low, and no privileges are required, but user interaction is needed.
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 apply the official update as directed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55057 to mitigate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:13:49.836Z
- 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-2026-55057","vendor":"Microsoft"}]
Threat ID: 6a5676b568715ace43f0aaf8
Added to database: 07/14/2026, 17:49:41 UTC
Last enriched: 08/13/2026, 15:37:24 UTC
Last updated: 08/27/2026, 11:04:02 UTC
Views: 47
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