CVE-2025-27749
Published: 08 April 2025
Summary
CVE-2025-27749 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-2025-27749 is a use-after-free vulnerability, tracked as CWE-416, that affects Microsoft Office and carries a CVSS 3.1 score of 7.8. The flaw permits an attacker to execute arbitrary code on an affected system when the vulnerable component processes specially crafted input.
An unauthorized attacker can trigger the issue locally without authentication, provided the victim opens a malicious file or document, resulting in full control over confidentiality, integrity, and availability on the target host.
The official Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27749 supplies patch availability and mitigation guidance for supported Office versions.
EPSS for the CVE rose from a low baseline to a recorded peak of 0.0121 before settling at the current value of 0.0058, indicating emerging exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10140
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.