CVE-2025-27745
Published: 08 April 2025
Summary
CVE-2025-27745 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 30.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-27745 is a use-after-free vulnerability in Microsoft Office tracked under CWE-416. The flaw carries a CVSS 3.1 score of 7.8 and permits an attacker to execute arbitrary code on an affected system when the vulnerability is triggered.
An unauthorized attacker can exploit the issue locally when a user opens a specially crafted file, resulting in full control over confidentiality, integrity, and availability on the target host without requiring elevated privileges.
The official advisory published by Microsoft is available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27745 and contains the latest guidance on patches and workarounds.
EPSS for the CVE rose from a low baseline to a recorded peak of 0.0121, indicating increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10143
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.