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 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 user interaction is required. The impact is limited to confidentiality with no integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
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. The vulnerability affects confidentiality only.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages remediation server-side. Users and administrators should follow the guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55028 to ensure their environment is updated and protected.
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 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 user interaction is required. The impact is limited to confidentiality with no integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
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. The vulnerability affects confidentiality only.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages remediation server-side. Users and administrators should follow the guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55028 to ensure their environment is updated and protected.
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: 07/14/2026, 19:35:08 UTC
Last updated: 07/15/2026, 03:40:20 UTC
Views: 4
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