CVE-2021-25276: SolarWinds Serv-U

High severity, CVSS 7.1. EPSS: 0.5% chance of exploitation in the next 30 days.

In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (that include users' password hashes) that is world readable and writable. An unprivileged Windows user (having access to the server's filesystem) can add an FTP user by copying a valid profile file to this directory. For example, if this profile sets up a user with a C:\ home directory, then the attacker obtains access to read or replace arbitrary files with LocalSystem privileges.

Affected products

• SolarWinds Serv-U: before 15.2.2 (fixed in 15.2.2); version 15.2.2 only

Published 2021-02-03. Last modified 2026-06-17.