CVE-2026-26156

CWE-20 — Improper Input ValidationCWE-122 — Heap-based Buffer OverflowCWE-125 — Out-of-bounds Read2 documents2 sources
Severity
7.8HIGH
EPSS
No EPSS data
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
16
Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2+13 more
Timeline
PublishedApr 14

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages16 packages

▶CVEListV5microsoft/windows_server_201610.0.14393.0 — 10.0.14393.9060
▶CVEListV5microsoft/windows_server_201910.0.17763.0 — 10.0.17763.8644
▶CVEListV5microsoft/windows_server_202210.0.20348.0 — 10.0.20348.5020
▶CVEListV5microsoft/windows_server_202510.0.26100.0 — 10.0.26100.32690
▶CVEListV5microsoft/windows_10_version_160710.0.14393.0 — 10.0.14393.9060

🔴Vulnerability Details

1
CVEList
Windows Hyper-V Remote Code Execution Vulnerability↗2026-04-14
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CVE-2026-26156 (HIGH CVSS 7.8) | Heap-based buffer overflow in Windo | cvebase.io