CVE-2026-55023: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in Microsoft 365 Apps for Enterprise, which could allow an unauthorized attacker to disclose information locally. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, and user interaction needed. 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 unauthorized local attacker could exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information. There is no impact on integrity or availability. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55023 for update and patching instructions.
CVE-2026-55023: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
Out-of-bounds read 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 (CWE-125) involves an out-of-bounds read in Microsoft 365 Apps for Enterprise, which could allow an unauthorized attacker to disclose information locally. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, and user interaction needed. 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 unauthorized local attacker could exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information. There is no impact on integrity or availability. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55023 for update and patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:12:44.284Z
- 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-2026-55023","vendor":"Microsoft"}]
Threat ID: 6a5676af68715ace43f0987f
Added to database: 07/14/2026, 17:49:35 UTC
Last enriched: 07/14/2026, 19:36:00 UTC
Last updated: 07/15/2026, 02:07:31 UTC
Views: 2
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