CVE-2026-62804 Microsoft CVE debrief

Who should care

Defenders responsible for Microsoft Office and Microsoft 365 Apps for Enterprise deployments should assess exposure and prioritize patching.

Why it matters

CVE-2026-62804 allows unauthorized attackers to execute code locally via external file path control in Microsoft Office Word. Defenders should prioritize patching vulnerable versions and verify system inventory.

• Potential local code execution by unauthorized attackers
• Need to verify affected versions and inventory systems
• Prioritize patching to prevent exploitation
• Monitor for potential exploitation attempts

Technical summary

External control of file name or path in Microsoft Office Word allows an unauthorized attacker to execute code locally. Affected products include Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019, and others. Defenders should prioritize patching vulnerable versions and verify system inventory to prevent potential local code execution. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity.

Defensive priority

Defenders should prioritize patching vulnerable Microsoft Office and Microsoft 365 Apps for Enterprise versions to prevent potential local code execution.

Recommended defensive actions

• Patch vulnerable Microsoft Office and Microsoft 365 Apps for Enterprise versions
• Inventory and verify affected systems
• Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but do not specify exploitation or impact. Vendor advisory is available. Affected products include Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019, and others. Defenders should verify system inventory and prioritize patching vulnerable versions.

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.