CVE-2026-55028: 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 involves an out-of-bounds read in Microsoft Office (Microsoft 365 Apps for Enterprise), which could allow an unauthorized attacker to locally disclose information. The CVSS vector indicates the attack requires local access with low complexity and no privileges but requires user interaction. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service. The affected version explicitly stated is 16.0.1.
Potential Impact
An unauthorized attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information. There is no impact on integrity or availability. No known exploits are currently active in the wild.
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-2026-55028 for update and mitigation details.
CVE-2026-55028: 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 involves an out-of-bounds read in Microsoft Office (Microsoft 365 Apps for Enterprise), which could allow an unauthorized attacker to locally disclose information. The CVSS vector indicates the attack requires local access with low complexity and no privileges but requires user interaction. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service. The affected version explicitly stated is 16.0.1.
Potential Impact
An unauthorized attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information. There is no impact on integrity or availability. No known exploits are currently active in the wild.
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-2026-55028 for update and mitigation details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:12:44.285Z
- 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-2026-55028","vendor":"Microsoft"}]
Threat ID: 6a5676b068715ace43f098b0
Added to database: 07/14/2026, 17:49:36 UTC
Last enriched: 08/13/2026, 15:31:25 UTC
Last updated: 08/26/2026, 22:52:11 UTC
Views: 69
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