CVE-2026-20929

EUVD-2026-2134
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoftCNA
7.5 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 11%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_10_1607
𝑥
< 10.0.14393.8783
microsoftwindows_10_1607
𝑥
< 10.0.14393.8783
microsoftwindows_10_1809
𝑥
< 10.0.17763.8276
microsoftwindows_10_1809
𝑥
< 10.0.17763.8276
microsoftwindows_10_21h2
𝑥
< 10.0.19044.6809
microsoftwindows_10_22h2
𝑥
< 10.0.19045.6809
microsoftwindows_11_23h2
𝑥
< 10.0.22631.6491
microsoftwindows_server_2008
-
microsoftwindows_server_2008
-
microsoftwindows_server_2012
-
microsoftwindows_server_2016
𝑥
< 10.0.14393.8783
microsoftwindows_server_2019
𝑥
< 10.0.17763.8276
microsoftwindows_server_2022
𝑥
< 10.0.20348.4648
microsoftwindows_server_2022_23h2
𝑥
< 10.0.25398.2092
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 10
1607 (x64, x86)
KB5073722
1809 (x64, x86)
KB5073723
21H2 (arm64, x64, x86)
KB5073724
22H2 (arm64, x64, x86)
KB5073724
Windows 11
23H2 (arm64, x64)
KB5073455
Windows Server 2008
Service Pack 2 (x64, x86)
KB5073700
Service Pack 2 Server Core (x64, x86)
KB5073700
Windows Server 2008 R2
Service Pack 1 (x64)
KB5073699
Service Pack 1 Server Core (x64)
KB5073699
Windows Server 2012
Server Core
KB5073698
Standard
KB5073698
Windows Server 2012 R2
Server Core
KB5073696
Standard
KB5073696
Windows Server 2016
Server Core
KB5073722
Standard
KB5073722
Windows Server 2019
Server Core
KB5073723
Standard
KB5073723
Windows Server 2022
23H2 Server Core
KB5073450
Server Core
KB5073457
Standard
KB5073457
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20929