Serv-U
CVE-2021-35252: Common Key Vulnerability in Serv-U FTP Server
Common encryption key appears to be used across all deployed instances of Serv-U FTP Server.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 3.1 7.5
EPSS0.54%Chance of exploitation in 30 days
Public exploitNot tracked
FixSee advisory
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 FTP Server 15.3 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.