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{"bugzilla": {"description": "FreeRDP: FreeRDP: Authentication bypass in RDSTLS handshake via PDU-type confusion", "id": "2513945", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513945"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-1287", "details": ["A flaw was found in FreeRDP. An unauthenticated remote attacker could bypass the server-side authentication in the RDSTLS (Remote Desktop Services Transport Layer Security) handshake. By sending a Capabilities PDU instead of the expected Authentication Request PDU, the server incorrectly processes the request, leading to a successful authentication without validating any credentials. This allows the attacker to gain unauthorized access to a session."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that FreeRDP servers are not configured with `RdstlsSecurity = TRUE` unless explicitly required. If `RdstlsSecurity` is necessary, restrict network access to the FreeRDP server to trusted clients only, for example, by implementing firewall rules. Restarting the FreeRDP server may be required for configuration changes to take effect."}, "name": "CVE-2026-72746", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-11T12:17:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72746\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72746\nhttps://github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x\nhttps://www.vulncheck.com/advisories/freerdp-before-rdstls-server-authentication-bypass-via-pdu-type-confusion"], "statement": "This is an Important flaw where FreeRDP servers configured with RDSTLS security are vulnerable to an authentication bypass. An unauthenticated remote attacker can exploit a PDU-type confusion during the handshake to gain unauthorized access, circumventing credential checks. This poses a significant risk to the confidentiality of systems exposing FreeRDP with RDSTLS enabled.", "threat_severity": "Important"}

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