CVE-2026-116844

Fclairamb ftpserverlib through 0.32.4 Cleartext FTPES Data Transfer via PROT P

Published Oct 27, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Fclairamb
Fclairamb ftpserverlib
Vendors & Products Fclairamb
Fclairamb ftpserverlib
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Fclairamb ftpserverlib through 0.32.4 Cleartext FTPES Data Transfer via PROT P
Weaknesses CWE-319
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 29, 2026, 10:52 AM
Reserved
Oct 27, 2026, 12:10 AM
Status
Deferred
Published
Oct 27, 2026, 1:19 AM
Modified
Oct 29, 2026, 11:17 AM