CVE-2025-27746
Published: 08 April 2025
Summary
CVE-2025-27746 is a high-severity Use After Free (CWE-416) vulnerability in Microsoft Office Long Term Servicing Channel. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 25.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-27746 is a use-after-free vulnerability, tracked as CWE-416, that affects Microsoft Office. The flaw received a CVSS 3.1 base score of 7.8 with the vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H and was published on 8 April 2025.
An unauthenticated local attacker can trigger the condition by convincing a user to open a malicious file or document. Successful exploitation grants the ability to execute arbitrary code on the target system with full impact to confidentiality, integrity, and availability.
The Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27746 supplies patch information and mitigation guidance. The associated EPSS values have remained low, reaching a peak of only 0.0121.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10137
Vulnerability details
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.