CVE-2026-26178
Published: 14 April 2026
Summary
CVE-2026-26178 is a high-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 33.2th 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).
Deeper analysis
CVE-2026-26178 is an integer size truncation vulnerability (CWE-190, CWE-681) in the Windows Advanced Rasterization Platform (WARP), a component of Microsoft Windows. Published on 2026-04-14, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
An unauthorized attacker can exploit this flaw locally to elevate privileges. The attack requires user interaction and no prior privileges, with a network attack vector enabling low-complexity exploitation that achieves high confidentiality, integrity, and availability impacts through privilege escalation.
Microsoft's Security Response Center (MSRC) provides an update guide for CVE-2026-26178 at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26178, outlining mitigation and patching details.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-22418
Vulnerability details
Integer size truncation in Windows Advanced Rasterization Platform (WARP) allows an unauthorized attacker to elevate privileges locally.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes an integer truncation vulnerability in Windows WARP exploited locally by an unauthorized attacker (PR:N) requiring user interaction to elevate privileges, directly enabling T1068: Exploitation for Privilege Escalation.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly addresses the CVE by requiring timely identification, reporting, and remediation of the integer truncation flaw in WARP through vendor patches.
Mitigates privilege escalation impact by ensuring WARP and related processes operate with least privileges necessary, limiting unauthorized access post-exploitation.
Implements memory protections such as non-executable memory and address randomization to hinder exploitation of the integer truncation vulnerability for code execution and privilege escalation.