CVE-2026-88212

EUVD-2026-122077
Use after free in Windows Network Address Translation (NAT) allows an unauthorized attacker to execute code over an adjacent network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
ADJACENT_NETWORK
HIGH
NONE
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Windows Releases
Platform
Version
Windows 10
1607 (x64, x86)
KB5131291
1809 (x64, x86)
KB5131085
21H2 (arm64, x64, x86)
KB5131096
22H2 (arm64, x64, x86)
KB5131096
Windows 11
23H2 (arm64, x64)
KB5131087
24H2 (arm64, x64)
KB5132061
25H2 (arm64, x64)
KB5132061
26H1 (arm64, x64)
KB5132059
26H2 (arm64, x64)
KB5132061
Windows Server 2016
Server Core
KB5131291
Standard
KB5131291
Windows Server 2019
Server Core
KB5131085
Standard
KB5131085
Windows Server 2022
Server Core
KB5131090
Standard
KB5131090
Windows Server 2025
Server Core
KB5131080
Standard
KB5131080
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88212