CVE-2026-28321: SolarWinds Serv-U

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

SolarWinds Serv-U is affected by a broken access control vulnerability that could allow arbitrary file read and write, which can then be used to escalate privileges and execute code as root. A domain administrator access is required, and the impact is lower in Windows installations.

Affected products

• SolarWinds Serv-U: before 2026.3 (fixed in 2026.3)

Published 2026-07-21. Last modified 2026-07-24.