CVE-2026-55035: 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 local attacker to disclose sensitive information. The CVSS vector indicates low attack complexity and no privileges required, but user interaction is needed. The vulnerability does not impact integrity or availability, only confidentiality. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An attacker who successfully exploits this vulnerability can read memory outside the intended bounds, potentially disclosing sensitive information locally. There is no impact on system integrity or availability. The attack requires local access and user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure that their Microsoft 365 Apps for Enterprise environment is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55035.
CVE-2026-55035: 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 local attacker to disclose sensitive information. The CVSS vector indicates low attack complexity and no privileges required, but user interaction is needed. The vulnerability does not impact integrity or availability, only confidentiality. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An attacker who successfully exploits this vulnerability can read memory outside the intended bounds, potentially disclosing sensitive information locally. There is no impact on system integrity or availability. The attack requires local access and user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure that their Microsoft 365 Apps for Enterprise environment is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55035.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:13:49.835Z
- 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-2026-55035","vendor":"Microsoft"}]
Threat ID: 6a5676b068715ace43f098c5
Added to database: 07/14/2026, 17:49:36 UTC
Last enriched: 07/14/2026, 19:34:01 UTC
Last updated: 07/15/2026, 01:47:35 UTC
Views: 2
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