CVE-2025-62557 Microsoft CVE debrief

Who should care

Administrators and security teams managing Microsoft Office deployments, especially fleets running Office LTSC, Microsoft 365 Apps for enterprise, or mixed Windows/macOS/Android Office installations. Endpoint teams should prioritize systems where untrusted local software or users can run.

Technical summary

The supplied NVD record describes a use-after-free condition in Microsoft Office that can be abused by an unauthorized local attacker to execute code. The CVSS vector is AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating high impact once local access conditions are met. NVD lists vulnerable CPEs for Microsoft 365 Apps for enterprise, Office 2016/2019, Office LTSC 2021/2024, and Office for Android. Microsoft’s advisory is referenced by NVD for vendor guidance.

Defensive priority

High — patch affected Microsoft Office installations promptly, with extra urgency on endpoints that allow untrusted local execution or that host sensitive data.

Recommended defensive actions

• Apply the Microsoft update referenced in the vendor advisory for CVE-2025-62557.
• Inventory Office deployments against the affected NVD CPE families, including Microsoft 365 Apps for enterprise and Office LTSC 2021/2024.
• Treat shared workstations and endpoints with broader local user access as higher priority for remediation.
• Monitor for unusual Office crashes or suspicious local execution activity on affected systems.
• Confirm remediation using Microsoft’s Security Update Guide entry for CVE-2025-62557.

Evidence notes

This debrief is based on the supplied NVD record and the Microsoft security advisory link referenced by NVD. The CVE description, CVSS vector, CWE-416 mapping, and affected CPE criteria are taken from the provided corpus. No exploit steps, reproduction details, or unsupported remediation specifics are included.

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.