CVE-2026-129120
C-Kermit 11.0.506 before 11.1.515 RECEIVE CONFIRM Bypass via Recursive GET
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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/authorized_keys or shell startup files under the current directory, which rq_under_root() accepts silently, enabling persistent access or code execution.
| CWE | CWE-863 |
| Vendor | openkermit |
| Product | c-kermit |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
OpenKermit / C-Kermit
11.0.506 < 11.1.515
References
github.com: https://github.com/OpenKermit/ckermit/security/advisories/GHSA-vhrv-7jrq-95qj github.com: https://github.com/OpenKermit/ckermit/commit/49e04a5ccfa08706b1d7e51dce4059f4adce50f3 github.com: https://github.com/OpenKermit/ckermit/releases/tag/v11.1.515 github.com: https://github.com/OpenKermit/ckermit/blob/v11.0.514/ckcfns.c#L3452 vulncheck.com: https://www.vulncheck.com/advisories/c-kermit-11.0.506-before-11.1.515-receive-confirm-bypass-via-recursive-get
Credits
John Goerzen John Goerzen