CVE-2025-27752
Published: 08 April 2025
Summary
CVE-2025-27752 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Office Long Term Servicing Channel. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 23.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-27752 is a heap-based buffer overflow vulnerability, tracked under CWE-122, that affects Microsoft Office Excel. The flaw carries a CVSS 3.1 base score of 7.8 and permits an attacker to execute arbitrary code on an affected system.
An unauthorized attacker can exploit the issue locally when a user opens a specially crafted Excel file. Successful exploitation grants the attacker the ability to run code with the privileges of the current user, resulting in full impact to confidentiality, integrity, and availability without requiring elevated privileges.
Microsoft has published an advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27752 that addresses the vulnerability. The associated EPSS score remains low, with a current value of 0.0096 and a recorded peak of 0.0105.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10138
Vulnerability details
Heap-based buffer overflow 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
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.