CVE-2026-72940

EUVD-2026-73346
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 56.81%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_11_23h2
𝑥
< 10.0.22631.7582
microsoftwindows_11_24h2
𝑥
< 10.0.26100.9445
microsoftwindows_11_25h2
𝑥
< 10.0.26200.9445
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2954
microsoftwindows_server_2022
𝑥
< 10.0.20348.5622
microsoftwindows_server_2025
𝑥
< 10.0.26100.33438
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 11
23H2 (arm64, x64)
24H2 (arm64, x64)
25H2 (arm64, x64)
26H1 (arm64, x64)
Windows Server 2022
Server Core
Standard
Windows Server 2025
Server Core
Standard