Serv-U
CVE-2021-35247: Improper Input Validation Vulnerability in Serv-U
Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Serv-U 15.2 | 15.3 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.
Exploitation
CISA lists this CVE as exploited in the wild since 21 Jan 2022.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.