CVE-2026-63530: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-63530) involves an out-of-bounds read in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally. The vulnerability is tracked under CWE-125. The CVSS 3.1 vector indicates local attack vector, low complexity, no privileges required, user interaction required, and high impact on confidentiality. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information on the local system. The integrity and availability are not impacted. The attack requires local access and user interaction.
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 ensure their Microsoft 365 Apps for Enterprise are updated according to Microsoft's guidance at the provided advisory URL.
CVE-2026-63530: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
Out-of-bounds read in Microsoft Office Word 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 (CVE-2026-63530) involves an out-of-bounds read in Microsoft Office Word, part of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally. The vulnerability is tracked under CWE-125. The CVSS 3.1 vector indicates local attack vector, low complexity, no privileges required, user interaction required, and high impact on confidentiality. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information on the local system. The integrity and availability are not impacted. The attack requires local access and user interaction.
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 ensure their Microsoft 365 Apps for Enterprise are updated according to Microsoft's guidance at the provided advisory URL.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-16T22:05:22.741Z
- 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-2026-63530","vendor":"Microsoft"}]
Threat ID: 6a7b5828bf8831d5391562a2
Added to database: 08/11/2026, 17:13:12 UTC
Last enriched: 08/11/2026, 20:43:05 UTC
Last updated: 08/12/2026, 01:01:14 UTC
Views: 2
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