🛡️ CVE-2025-62554 — 365-apps

🟠 CVSS 8.4 — High ✅ No Known Exploit CWE-843 NVD
8.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2025-62554 is classified as CWE-843: Type Confusion. A resource is accessed as one type while actually being another, so the interpretation of its memory is wrong.

Affected software

CVE-2025-62554 is recorded against 4 packages.

  • 365-apps
  • 365-copilot
  • office
  • office-long-term-servicing-channel

Timeline and source

Published on 9 December 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity HIGH
CVSS Score 8.4
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-843
Public Exploit ✅ No
Source NVD
Published 2025-12-09
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
365-apps — —
365-copilot — —
office — —
office-long-term-servicing-channel — —

Similar Threats

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