CVE-2026-23672
Published: 10 March 2026
Summary
CVE-2026-23672 is a high-severity Out-of-bounds Read (CWE-125) 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 at the 8.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and AC-6 (Least Privilege).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mandates timely remediation of flaws like the out-of-bounds read vulnerability in the UDFS driver through patching.
Restricts system to least functionality by disabling unnecessary components such as the UDFS driver if not required for operations.
Enforces least privilege to limit the impact of low-privileged local attackers attempting exploitation of the elevation vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local EoP via out-of-bounds read in kernel-mode file system driver directly enables T1068 Exploitation for Privilege Escalation.
NVD Description
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
Deeper analysisAI
CVE-2026-23672 is an Elevation of Privilege vulnerability affecting the Windows Universal Disk Format File System Driver (UDFS). Published on 2026-03-10, it stems from CWE-125 (Out-of-bounds Read) and carries 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), indicating high severity due to its potential for significant impact with relatively low barriers to exploitation.
A local attacker with low privileges can exploit this vulnerability through low-complexity means without requiring user interaction. Successful exploitation enables high-impact disruption to confidentiality, integrity, and availability, typically resulting in privilege escalation that could grant the attacker greater system control.
Microsoft's Security Update Guide provides details on mitigation and patching for CVE-2026-23672, accessible at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23672.
Details
- CWE(s)