CVE-2025-21234
Published: 14 January 2025
Summary
CVE-2025-21234 is a high-severity Improper Input Validation (CWE-20) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 38.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the elevation of privilege vulnerability in Windows PrintWorkflowUserSvc by requiring timely application of vendor-provided patches as per Microsoft's advisory.
Mandates validation of inputs to system components like PrintWorkflowUserSvc, directly countering the improper input validation (CWE-20) that enables local privilege escalation.
Enforces least privilege for accounts and services, limiting the privileges available for escalation and reducing the impact of exploitation by low-privilege local attackers.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local EoP vulnerability enabling exploitation for privilege escalation via improper input validation.
NVD Description
Windows PrintWorkflowUserSvc Elevation of Privilege Vulnerability
Deeper analysisAI
CVE-2025-21234 is an Elevation of Privilege vulnerability in the Windows PrintWorkflowUserSvc component. Published on 2025-01-14, it has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-20 (Improper Input Validation) along with NVD-CWE-noinfo.
A local attacker with low privileges can exploit this vulnerability with low attack complexity and no user interaction required. Successful exploitation enables high-impact confidentiality, integrity, and availability consequences, allowing privilege escalation on affected Windows systems.
Microsoft's Security Response Center provides update guidance and mitigation details in its advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21234.
Details
- CWE(s)