CVE-2026-80088 Microsoft CVE debrief

Who should care

Defenders responsible for Microsoft Office Word installations, particularly in networked environments, should assess exposure and apply patches or updates provided by Microsoft.

Why it matters

CVE-2026-80088 is a medium-severity vulnerability in Microsoft Office Word that allows unauthorized information disclosure over a network. Defenders should assess exposure, prioritize patching, and monitor for potential exploitation attempts.

• Assess and prioritize patching of vulnerable Microsoft Office Word installations
• Verify information disclosure risks in networked environments
• Monitor for potential exploitation attempts

Technical summary

CVE-2026-80088 is an out-of-bounds read vulnerability in Microsoft Office Word that allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5 and is classified as MEDIUM severity. This vulnerability affects Microsoft Office Word installations, particularly in networked environments. Defenders should assess exposure, prioritize patching, and monitor for potential exploitation attempts.

Defensive priority

Medium priority for defenders to assess exposure and apply patches

Recommended defensive actions

• Assess exposure of Microsoft Office Word installations to this vulnerability
• Apply patches or updates provided by Microsoft
• Verify information disclosure risks in networked environments

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but specific version information and exploitation details are not provided. The vulnerability affects Microsoft Office Word installations, particularly in networked environments. Defenders should verify information disclosure risks and monitor for potential exploitation attempts. The CVE record was published on 2026-09-08T18:20:51.280Z and has not been modified since then. The official CVE Program record and NVD detail

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.