Feb 2026: Windows Hyper-V Remote Code Execution Vulnerability
CVE-2026-21244 Published on February 10, 2026
Windows Hyper-V Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-21244
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Affected Versions
Microsoft Windows 10 Version 1607:- Version 10.0.14393.0 and below 10.0.14393.8868 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8389 is affected.
- Version 10.0.19044.0 and below 10.0.19044.6937 is affected.
- Version 10.0.19045.0 and below 10.0.19045.6937 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6649 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6649 is affected.
- Version 10.0.26100.0 and below 10.0.26100.7840 is affected.
- Version 10.0.26200.0 and below 10.0.26200.7840 is affected.
- Version 10.0.28000.0 and below 10.0.28000.1575 is affected.
- Version 10.0.28000.0 and below 10.0.28000.1575 is affected.
- Version 10.0.14393.0 and below 10.0.14393.8868 is affected.
- Version 10.0.14393.0 and below 10.0.14393.8868 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8389 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8389 is affected.
- Version 10.0.20348.0 and below 10.0.20348.4773 is affected.
- Version 10.0.25398.0 and below 10.0.25398.2149 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32370 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32370 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.