OpenKermit C-Kermit up to 11.1.514 ckcftp.c doftpget path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in OpenKermit C-Kermit up to 11.1.514. This affects the function doftpget of the file ckcftp.c. Performing a manipulation results in path traversal. This vulnerability is known as CVE-2026-129121. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in OpenKermit C-Kermit up to 11.1.514. This affects the function doftpget of the file ckcftp.c. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity. The summary by CVE is:

C-Kermit 8.0.200 before 11.1.515 contains a path traversal vulnerability in doftpget() in ckcftp.c that allows malicious FTP servers to write files outside the intended directory. Attackers can return absolute paths, tilde names, or dot-dot components in NLST or MLSD listings during MGET /RECURSIVE to overwrite files like .bashrc, leading to code execution.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-129121 since 11/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 11.1.515 eliminates this vulnerability.

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Productinfo

Vendor

• OpenKermit

Name

• C-Kermit

Version

• 11.1.514

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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