CVE-2026-55045: 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 execute code locally.
AI Analysis
Technical Summary
This vulnerability, tracked as CVE-2026-55045 and classified under CWE-125 (Out-of-bounds Read), affects Microsoft 365 Apps for Enterprise version 16.0.1. It allows an unauthorized attacker to perform an out-of-bounds read in Microsoft Office, potentially leading to local code execution. The CVSS v3.1 base score is 8.4, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. No known exploits are currently reported in the wild.
Potential Impact
Successful exploitation could allow an unauthorized attacker to execute code locally on affected systems, impacting confidentiality, integrity, and availability of the affected Microsoft 365 Apps for Enterprise environment. The high CVSS score reflects the significant potential impact.
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 apply the official update as guided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55045 to mitigate this vulnerability.
CVE-2026-55045: 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 execute code locally.
CVSS v3.1
Score 8.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-55045 and classified under CWE-125 (Out-of-bounds Read), affects Microsoft 365 Apps for Enterprise version 16.0.1. It allows an unauthorized attacker to perform an out-of-bounds read in Microsoft Office, potentially leading to local code execution. The CVSS v3.1 base score is 8.4, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. No known exploits are currently reported in the wild.
Potential Impact
Successful exploitation could allow an unauthorized attacker to execute code locally on affected systems, impacting confidentiality, integrity, and availability of the affected Microsoft 365 Apps for Enterprise environment. The high CVSS score reflects the significant potential impact.
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 apply the official update as guided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55045 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-2026-55045","vendor":"Microsoft"}]
Threat ID: 6a5676b168715ace43f09940
Added to database: 07/14/2026, 17:49:37 UTC
Last enriched: 08/13/2026, 15:34:44 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 45
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