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.

Published: 2026-01-13 · CVSS: 8.1 · CVSS 3.1

Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

Original CVE JSON · STIX 2.1

Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7