CVE-2026-55027: 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
CVE-2026-55027 is a CWE-125 out-of-bounds read vulnerability in Microsoft 365 Apps for Enterprise (version 16.0.1). This flaw allows an unauthorized attacker with local access and user interaction to read memory outside the intended bounds, potentially disclosing sensitive information. The vulnerability has been assigned a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has released an official fix for this issue and manages remediation for this cloud-hosted service. No known exploits have been reported in the wild.
Potential Impact
An unauthorized local attacker can exploit this vulnerability to read memory beyond intended boundaries, potentially disclosing sensitive information. The integrity and availability of the system are not impacted. The attack requires user interaction and local access.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch to Microsoft 365 Apps for Enterprise version 16.0.1 as detailed in the Microsoft advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55027). Since this is a cloud service, Microsoft manages remediation server-side; verify that your environment is updated accordingly.
CVE-2026-55027: 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
CVE-2026-55027 is a CWE-125 out-of-bounds read vulnerability in Microsoft 365 Apps for Enterprise (version 16.0.1). This flaw allows an unauthorized attacker with local access and user interaction to read memory outside the intended bounds, potentially disclosing sensitive information. The vulnerability has been assigned a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has released an official fix for this issue and manages remediation for this cloud-hosted service. No known exploits have been reported in the wild.
Potential Impact
An unauthorized local attacker can exploit this vulnerability to read memory beyond intended boundaries, potentially disclosing sensitive information. The integrity and availability of the system are not impacted. The attack requires user interaction and local access.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch to Microsoft 365 Apps for Enterprise version 16.0.1 as detailed in the Microsoft advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55027). Since this is a cloud service, Microsoft manages remediation server-side; verify that your environment is updated accordingly.
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-2026-55027","vendor":"Microsoft"}]
Threat ID: 6a5676b068715ace43f098ad
Added to database: 07/14/2026, 17:49:36 UTC
Last enriched: 07/14/2026, 19:35:18 UTC
Last updated: 07/15/2026, 03:40:21 UTC
Views: 4
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