8.1

CVE-2026-20856

Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Windows 10 1607 HwPlatform x64 Version < 10.0.14393.8783
Microsoft ≫ Windows 10 1607 HwPlatform x86 Version < 10.0.14393.8783
Microsoft ≫ Windows 10 1809 HwPlatform x64 Version < 10.0.17763.8276
Microsoft ≫ Windows 10 1809 HwPlatform x86 Version < 10.0.17763.8276
Microsoft ≫ Windows 10 21h2 Version < 10.0.19044.6809
Microsoft ≫ Windows 10 22h2 Version < 10.0.19045.6809
Microsoft ≫ Windows 11 23h2 Version < 10.0.22631.6491
Microsoft ≫ Windows 11 24h2 Version < 10.0.26100.7623
Microsoft ≫ Windows 11 25h2 Version < 10.0.26200.7623
Microsoft ≫ Windows Server 2016 Version < 10.0.14393.8783
Microsoft ≫ Windows Server 2019 Version < 10.0.17763.8276
Microsoft ≫ Windows Server 2022 Version < 10.0.20348.4648
Microsoft ≫ Windows Server 2022 23h2 Version < 10.0.25398.2092
Microsoft ≫ Windows Server 2025 Version < 10.0.26100.32230
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.12% 0.631
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Microsoft 8.1 2.2 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20856
Vendor Advisory