CVE-2026-55032: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-55032) is a use-after-free issue in Microsoft Office Word component of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to execute arbitrary code locally by exploiting the improper handling of memory after it has been freed. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vulnerability affects version 16.0.1. Microsoft has released an official fix for this issue and manages remediation for this cloud-hosted service. No public exploits are currently known.
Potential Impact
Successful exploitation allows an unauthorized attacker to execute code locally with potential full control over the affected system, impacting confidentiality, integrity, and availability. This could lead to compromise of user data and system stability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided update to Microsoft 365 Apps for Enterprise version 16.0.1 or later as recommended in the Microsoft advisory. Since this is a cloud service, Microsoft manages remediation on their side, but local clients should be updated accordingly.
CVE-2026-55032: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Description
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-55032) is a use-after-free issue in Microsoft Office Word component of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to execute arbitrary code locally by exploiting the improper handling of memory after it has been freed. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vulnerability affects version 16.0.1. Microsoft has released an official fix for this issue and manages remediation for this cloud-hosted service. No public exploits are currently known.
Potential Impact
Successful exploitation allows an unauthorized attacker to execute code locally with potential full control over the affected system, impacting confidentiality, integrity, and availability. This could lead to compromise of user data and system stability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided update to Microsoft 365 Apps for Enterprise version 16.0.1 or later as recommended in the Microsoft advisory. Since this is a cloud service, Microsoft manages remediation on their side, but local clients should be 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-2026-55032","vendor":"Microsoft"}]
Threat ID: 6a5676b068715ace43f098bc
Added to database: 07/14/2026, 17:49:36 UTC
Last enriched: 07/14/2026, 19:34:32 UTC
Last updated: 07/15/2026, 02:07:20 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.