Is there a public exploit for CVE-2026-129120?

No public exploit for CVE-2026-129120 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-129120?

CVE-2026-129120 scores CVSS 5.9 (v4.0), rated medium.

What does CVE-2026-129120 affect?

CVE-2026-129120 affects OpenKermit C-Kermit.

5.9 Medium

C-Kermit 11.0.506 before 11.1.515 contains a RECEIVE CONFIRM bypass vulnerability that allows malicious Kermit servers to write unrequested…

CVE-2026-129120

C-Kermit 11.0.506 before 11.1.515 contains a RECEIVE CONFIRM bypass vulnerability that allows malicious Kermit servers to write unrequested files without prompting by abusing recursive GET root computation in ckcfns.c. Attackers can send files such as .ssh/authorizedkeys or shell startup files under the current directory, which rqunderroot() accepts silently, enabling persistent access or code execution.

Assessment

CVSS: 5.9 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 13 November 2026
Last updated: 13 November 2026
Affected: OpenKermit · C-Kermit
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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