CVE-2025-27750
Published: 08 April 2025
Summary
CVE-2025-27750 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-2025-27750 is a use-after-free vulnerability (CWE-416) in Microsoft Office Excel that carries a CVSS 3.1 base score of 7.8. The flaw permits an attacker to execute arbitrary code on an affected system when a specially crafted workbook is opened.
An unauthorized local attacker can trigger the issue without authentication by supplying a malicious file that the victim must open, satisfying the UI:R requirement in the CVSS vector. Successful exploitation yields high-impact code execution with full control over confidentiality, integrity, and availability on the target host.
Microsoft has published an advisory detailing the vulnerability and corresponding security updates at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27750. The EPSS score reached a peak of 0.0138 before settling at the current value of 0.0079, indicating modest post-disclosure interest that remains low overall.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10134
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.