CVE-2025-27751
Published: 08 April 2025
Summary
CVE-2025-27751 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 19.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-27751 is a use-after-free vulnerability in Microsoft Office Excel, tracked under CWE-416. The flaw received a CVSS 3.1 base score of 7.8 and was published on 8 April 2025.
An unauthenticated local attacker can trigger the issue by convincing a user to open a malicious Excel document. Successful exploitation grants the ability to execute arbitrary code on the target system with full impact to confidentiality, integrity, and availability.
Microsoft has published an advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27751 that addresses the vulnerability. The associated EPSS score remains flat at 0.0139 with no material increase observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10135
Vulnerability details
Use after free in Microsoft Office Excel 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.