{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-119744", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-30T15:31:52.079Z", "datePublished": "2026-11-05T14:50:42.158Z", "dateUpdated": "2026-11-05T14:50:42.158Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-05T14:50:42.158Z"}, "title": "Cendio ThinLinc Improper Authentication via Web Access", "descriptions": [{"lang": "en", "value": "Cendio ThinLinc contains an improper authentication vulnerability in its browser-based web client (tlwebaccess) that allows an authenticated attacker to impersonate any other user, including root, by exploiting flaws in multi-step authentication flows such as one-time passwords, login banners, or expired password prompts. Attackers can leverage this authentication bypass during the multi-step login process to gain unauthorized access to other user accounts, including administrative privileges, in versions from 4.1.0 through 4.20.0."}], "datePublic": "2026-04-22T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "Authentication Bypass by Spoofing", "cweId": "CWE-290", "type": "CWE"}]}], "affected": [{"defaultStatus": "unaffected", "vendor": "Cendio", "product": "ThinLinc", "versions": [{"status": "affected", "version": "4.1.0", "versionType": "semver", "lessThan": "4.15.1"}, {"status": "affected", "version": "4.16.0", "versionType": "semver", "lessThan": "4.16.1"}, {"status": "affected", "version": "4.17.0", "versionType": "semver", "lessThan": "4.17.1"}, {"status": "affected", "version": "4.18.0", "versionType": "semver", "lessThan": "4.18.1"}, {"status": "affected", "version": "4.19.0", "versionType": "semver", "lessThan": "4.19.1"}, {"status": "affected", "version": "4.20.0", "versionType": "semver", "lessThan": "4.20.1"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.7, "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}], "references": [{"url": "https://community.thinlinc.com/t/thinlinc-4-15-1-through-4-20-1-security-release/1985", "name": "ThinLinc 4.15.1 through 4.20.1 security release", "tags": ["release-notes", "patch"]}, {"url": "https://community.thinlinc.com/t/urgent-thinlinc-security-issue/1970", "name": "Urgent: ThinLinc security issue", "tags": ["vendor-advisory"]}, {"url": "https://www.vulncheck.com/advisories/cendio-thinlinc-improper-authentication-via-web-access", "name": "VulnCheck Advisory: Cendio ThinLinc Improper Authentication via Web Access", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "Cosmikal S.L.", "type": "finder"}], "x_generator": {"engine": "vulncheck"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "ThinLinc", "vendor": "Cendio", "versions": [{"lessThan": "4.15.1", "status": "affected", "version": "4.1.0", "versionType": "semver"}, {"lessThan": "4.16.1", "status": "affected", "version": "4.16.0", "versionType": "semver"}, {"lessThan": "4.17.1", "status": "affected", "version": "4.17.0", "versionType": "semver"}, {"lessThan": "4.18.1", "status": "affected", "version": "4.18.0", "versionType": "semver"}, {"lessThan": "4.19.1", "status": "affected", "version": "4.19.0", "versionType": "semver"}, {"lessThan": "4.20.1", "status": "affected", "version": "4.20.0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Cendio ThinLinc contains an improper authentication vulnerability in its browser-based web client (tlwebaccess) that allows an authenticated attacker to impersonate any other user, including root, by exploiting flaws in multi-step authentication flows such as one-time passwords, login banners, or expired password prompts. Attackers can leverage this authentication bypass during the multi-step login process to gain unauthorized access to other user accounts, including administrative privileges, in versions from 4.1.0 through 4.20.0."}], "id": "CVE-2026-119744", "lastModified": "2026-11-05T15:17:20.557", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-11-05T15:17:20.557", "references": [{"source": "disclosure@vulncheck.com", "url": "https://community.thinlinc.com/t/thinlinc-4-15-1-through-4-20-1-security-release/1985"}, {"source": "disclosure@vulncheck.com", "url": "https://community.thinlinc.com/t/urgent-thinlinc-security-issue/1970"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/cendio-thinlinc-improper-authentication-via-web-access"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

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