CVE-2026-129122

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Source
https://cve.org/CVERecord?id=CVE-2026-129122
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-129122.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-129122
Aliases
Published
2026-11-13T16:23:44Z
Modified
2026-11-14T02:56:11Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
C-Kermit 6.0.192 before 11.1.515 Buffer Overflow via Telnet NEW-ENVIRON Negotiation
Details

C-Kermit 6.0.192 before 11.1.515 contains a buffer overflow vulnerability in tn_snenv() in ckctel.c that allows malicious Telnet servers to corrupt client memory via crafted NEW-ENVIRON SEND subnegotiation. Malicious or machine-in-the-middle servers can send oversized variable names before authentication, overflowing a 16-byte stack buffer and a miscomputed heap buffer to corrupt stack and heap memory.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/129xxx/CVE-2026-129122.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "6.0.192"
                        },
                        {
                            "fixed": "11.1.515"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "6.0.192"
                        },
                        {
                            "fixed": "11.1.515"
                        }
                    ],
                    "source": "DESCRIPTION"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/openkermit/ckermit

Affected ranges

Type
GIT
Repo
https://github.com/openkermit/ckermit
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
39ab009a365b97632e9975e1266fa618c4bdc59f
Fixed
42cf6decb926f56d606a76262791aaf071955d25
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "39ab009a365b97632e9975e1266fa618c4bdc59f"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "42cf6decb926f56d606a76262791aaf071955d25"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v11.*
v11.0
v11.0.502
v11.0.503
v11.0.504
v11.0.505
v11.0.506
v11.0.507
v11.0.508
v11.0.509
v11.0.510
v11.0.511
v11.0.512
v11.0.513
v11.0.514

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-129122.json"