CVE-2025-27737
Published: 08 April 2025
Summary
CVE-2025-27737 is a high-severity Improper Input Validation (CWE-20) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.6 (High).
Operationally, ranked in the top 18.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-27737 is an improper input validation flaw, tracked under CWE-20, that affects the Windows Security Zone Mapping component. The vulnerability received a CVSS 3.1 score of 8.6 and permits an attacker to bypass a security feature through local interaction with the affected mapping logic.
An unauthorized local attacker can exploit the issue without privileges when user interaction occurs, resulting in a scope change that yields high impact to confidentiality, integrity, and availability. Successful exploitation allows the attacker to circumvent intended security zone restrictions on the Windows system.
The single reference points to the Microsoft Security Response Center advisory for CVE-2025-27737, which is the authoritative source for any official patches or mitigation guidance. The associated EPSS score remains flat at 0.0149 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10150
Vulnerability details
Improper input validation in Windows Security Zone Mapping allows an unauthorized attacker to bypass a security feature 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.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.