VULNERABILITY INTELLIGENCE

CVE-2026-20856

CVSS score8.1 HIGH
EPSS probability1.12%
CISA KEVNot currently listed
Published2026-01-13
Last modified2026-07-30
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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

Weakness classification

  • secure@microsoft.com: CWE-20

Primary references