{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72746", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-10T13:53:42.482Z", "datePublished": "2026-08-11T12:17:00.687Z", "dateUpdated": "2026-08-11T14:57:03.252Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-11T12:17:00.687Z"}, "datePublic": "2026-07-26T00:00:00.000Z", "title": "FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion", "descriptions": [{"lang": "en", "value": "FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at the current step. Because the rdpRdstls object is calloc-zeroed, its resultCode defaults to 0 (RDSTLS_RESULT_SUCCESS). An unauthenticated remote client can send a Capabilities PDU instead of the required Authentication Request PDU; rdstls_process_capabilities() returns success without ever setting resultCode, so the server responds with an AUTHRSP carrying resultCode SUCCESS and treats the session as authenticated without evaluating any password, redirection GUID, or auto-reconnect cookie. This affects the released FreeRDP 3.x series (e.g., 3.27.1) and master HEAD; at the time of the advisory no patched version was available."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Authentication", "cweId": "CWE-287", "type": "CWE"}]}], "affected": [{"vendor": "FreeRDP", "product": "FreeRDP", "defaultStatus": "unaffected", "versions": [{"version": "3.0.0", "lessThan": "3.30.0", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.24.0:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.24.1:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.24.2:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.25.0:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.26.0:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:3.23.0:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:freerdp:freerdp:2.11.8:*:*:*:*:*:*:*"}]}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "format": "CVSS"}], "references": [{"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-rqgv-grx4-xm6x)"}, {"url": "https://github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695", "tags": ["patch"]}, {"name": "VulnCheck Advisory: FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/freerdp-before-rdstls-server-authentication-bypass-via-pdu-type-confusion"}], "credits": [{"lang": "en", "value": "DavidKorczynski", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"references": [{"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-11T14:56:40.198068Z", "id": "CVE-2026-72746", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-11T14:57:03.252Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72746", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-11T14:56:40.198068Z"}}}], "references": [{"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-11T14:56:59.009Z"}}], "cna": {"title": "FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion", "credits": [{"lang": "en", "type": "reporter", "value": "DavidKorczynski"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}}, {"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "FreeRDP", "product": "FreeRDP", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.30.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "datePublic": "2026-07-26T00:00:00.000Z", "references": [{"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x", "name": "GitHub Security Advisory (GHSA-rqgv-grx4-xm6x)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695", "tags": ["patch"]}, {"url": "https://www.vulncheck.com/advisories/freerdp-before-rdstls-server-authentication-bypass-via-pdu-type-confusion", "name": "VulnCheck Advisory: FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "vulncheck-endgame"}, "descriptions": [{"lang": "en", "value": "FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at the current step. Because the rdpRdstls object is calloc-zeroed, its resultCode defaults to 0 (RDSTLS_RESULT_SUCCESS). An unauthenticated remote client can send a Capabilities PDU instead of the required Authentication Request PDU; rdstls_process_capabilities() returns success without ever setting resultCode, so the server responds with an AUTHRSP carrying resultCode SUCCESS and treats the session as authenticated without evaluating any password, redirection GUID, or auto-reconnect cookie. This affects the released FreeRDP 3.x series (e.g., 3.27.1) and master HEAD; at the time of the advisory no patched version was available."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-287", "description": "Improper Authentication"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:freerdp:freerdp:3.24.0:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:3.24.1:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:3.24.2:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:3.25.0:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:3.26.0:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:3.23.0:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:freerdp:freerdp:2.11.8:*:*:*:*:*:*:*", "vulnerable": true}], "operator": "OR"}]}], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-11T12:17:00.687Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72746", "state": "PUBLISHED", "dateUpdated": "2026-08-11T14:57:03.252Z", "dateReserved": "2026-08-10T13:53:42.482Z", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "datePublished": "2026-08-11T12:17:00.687Z", "assignerShortName": "VulnCheck"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "FreeRDP", "vendor": "FreeRDP", "versions": [{"lessThan": "3.30.0", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at the current step. Because the rdpRdstls object is calloc-zeroed, its resultCode defaults to 0 (RDSTLS_RESULT_SUCCESS). An unauthenticated remote client can send a Capabilities PDU instead of the required Authentication Request PDU; rdstls_process_capabilities() returns success without ever setting resultCode, so the server responds with an AUTHRSP carrying resultCode SUCCESS and treats the session as authenticated without evaluating any password, redirection GUID, or auto-reconnect cookie. This affects the released FreeRDP 3.x series (e.g., 3.27.1) and master HEAD; at the time of the advisory no patched version was available."}], "id": "CVE-2026-72746", "lastModified": "2026-08-11T16:17:36.480", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72746", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-11T14:56:40.198068Z", "version": "2.0.3"}}]}, "published": "2026-08-11T13:19:05.520", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/freerdp-before-rdstls-server-authentication-bypass-via-pdu-type-confusion"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{}