Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 14, 2026 · NIST NVD

   Detected

   Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

2. Oct 14, 2026 · NIST NVD

   Updated

   Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

Affected

• cpe microsoft/windows 10 1607version unspecified
• cpe microsoft/windows 10 1809version unspecified
• cpe microsoft/windows 10 21h2version unspecified
• cpe microsoft/windows 10 22h2version unspecified
• cpe microsoft/windows 11 23h2version unspecified
• cpe microsoft/windows 11 24h2version unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-26156

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-26156

  30-day exploitation probability 0.5%

  first.org
• NIST NVDVulnerability recordCVE-2026-26156

  Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

  nvd.nist.gov

References

• Vendor Advisory · msrc.microsoft.com