CVE-2025-49697 Microsoft CVE debrief

Who should care

Organizations running affected Microsoft Office deployments should prioritize this issue, especially endpoints and managed desktops using Microsoft 365 Apps, Office 2016/2019, Office Long Term Servicing Channel 2021/2024, Office for Android, or Office Online Server as listed by NVD. Security and IT teams responsible for patching Office estates should treat it as a high-priority local-code-execution risk.

Technical summary

The official NVD record describes the flaw as a heap-based buffer overflow with CWE-122 classification. The CVSS vector is AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating local attack conditions and high potential impact once the vulnerable component is reached. NVD lists multiple affected Microsoft Office product families, and Microsoft’s vendor advisory is referenced as the primary official mitigation source.

Defensive priority

High. The combination of high CVSS, code execution impact, and broad Office product coverage makes this a strong patching priority for managed endpoints and Office services, even though it is not listed in the supplied data as a known exploited vulnerability.

Recommended defensive actions

• Review Microsoft’s advisory for CVE-2025-49697 and apply the vendor-recommended update for affected Office products.
• Prioritize patching of systems that run Microsoft 365 Apps, Office 2016/2019, Office LTSC 2021/2024, Office for Android, and Office Online Server where applicable.
• Validate which Office channels and architectures are present in your environment before rollout, since NVD lists x86, x64, and macOS variants for several affected families.
• Use asset inventory and software inventory to find exposed Office installations, then accelerate remediation on high-value endpoints and Office servers.
• Monitor Microsoft update status and confirm successful deployment rather than relying on advisory publication alone.

Evidence notes

All statements are based on the supplied NVD record and the referenced Microsoft advisory. The vulnerability description, CVSS score/vector, CWE-122 classification, and affected CPEs come from the official NVD source metadata. The Microsoft Security Response Center advisory is the only vendor reference provided in the corpus. No KEV listing was present in the supplied enrichment data.

Official resources