{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-129116", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-13T16:00:58.249Z", "datePublished": "2026-11-13T16:23:48.764Z", "dateUpdated": "2026-11-13T16:23:48.764Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-13T16:23:48.764Z"}, "datePublic": "2026-10-31T00:00:00.000Z", "title": "C-Kermit 7.0.197 before 11.1.515 IKSD Authentication Bypass via Refused Certificate Login", "descriptions": [{"lang": "en", "value": "C-Kermit from 7.0.197 before 11.1.515 contains an authentication bypass vulnerability in the IKSD SSL build that leaves Telnet authentication state at AUTH_VALID after a refused certificate login. Attackers holding a trusted certificate mapped to a refused account can log in as any other account with any password, gaining that account's shell access."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Authentication", "cweId": "CWE-287", "type": "CWE"}]}], "affected": [{"vendor": "OpenKermit", "product": "C-Kermit", "defaultStatus": "unaffected", "versions": [{"version": "7.0.197", "status": "affected", "lessThan": "11.1.515", "versionType": "semver"}], "packageURL": "pkg:github/OpenKermit/ckermit"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/OpenKermit/ckermit/security/advisories/GHSA-5pc4-gh6q-5h4w", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-5pc4-gh6q-5h4w)"}, {"url": "https://github.com/OpenKermit/ckermit/commit/fdfe8f13159f9276d87e02bedba15946b0edda97", "tags": ["patch"]}, {"url": "https://github.com/OpenKermit/ckermit/releases/tag/v11.1.515", "tags": ["release-notes"], "name": "C-Kermit v11.1.515 Release Notes"}, {"url": "https://github.com/OpenKermit/ckermit/blob/v11.0.514/ckufio.c#L8249", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: C-Kermit 7.0.197 before 11.1.515 IKSD Authentication Bypass via Refused Certificate Login", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/c-kermit-7.0.197-before-11.1.515-iksd-authentication-bypass-via-refused-certificate-login"}], "credits": [{"lang": "en", "value": "John Goerzen", "type": "finder"}, {"lang": "en", "value": "John Goerzen", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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