Medium severity4.8NVD Advisory· Published Oct 27, 2026
CVE-2026-116844
CVE-2026-116844
Description
Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because TransferOpen checks only the transferTLS flag set by PROT, not whether the prepared data connection uses TLS. When a client sends PROT P after PASV or PORT, file contents and directory listings cross the network unencrypted, even with mandatory encryption, letting on-path attackers read or modify them.
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Affected products
1- Range: <=0.32.4
Patches
Vulnerability mechanics
References
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