CVE-2026-55639

{"id": "CVE-2026-55639", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55639", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T19:01:32.890448Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "neutrinolabs", "product": "xrdp", "versions": [{"status": "affected", "version": "< 0.10.6.1"}]}]}], "published": "2026-07-20T18:16:54.287", "references": [{"url": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-6g36-mxcf-r3gc", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the parsing of Client Security Data within the Client MCS Connect Initial PDU with GCC Conference Create Request during the connection sequence. During the initial capability and security negotiation phase, the parser fails to perform sufficient length validation for the incoming data block. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed data. Due to missing bounds checks, the xrdp process may read a small number of bytes beyond the declared data block boundary, potentially disclosing process memory contents that could be combined with other vulnerabilities. This issue has been fixed in version 0.10.6.1."}, {"lang": "es", "value": "xrdp es un servidor RDP de c\u00f3digo abierto. Las versiones 0.10.6 y anteriores contienen una vulnerabilidad relacionada con el an\u00e1lisis de los datos de seguridad del cliente dentro de la PDU inicial de conexi\u00f3n MCS del cliente con la solicitud de creaci\u00f3n de conferencia GCC durante la secuencia de conexi\u00f3n. Durante la fase inicial de negociaci\u00f3n de capacidades y seguridad, el analizador no realiza una validaci\u00f3n de longitud suficiente para el bloque de datos entrante. Un atacante remoto no autenticado podr\u00eda potencialmente explotar esta falla enviando un paquete RDP especialmente dise\u00f1ado que contenga datos malformados. Debido a la falta de comprobaciones de l\u00edmites, el proceso xrdp puede leer un peque\u00f1o n\u00famero de bytes m\u00e1s all\u00e1 del l\u00edmite del bloque de datos declarado, revelando potencialmente el contenido de la memoria del proceso que podr\u00eda combinarse con otras vulnerabilidades. Este problema ha sido solucionado en la versi\u00f3n 0.10.6.1."}], "lastModified": "2026-10-24T20:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A994DC5A-6181-45D2-A489-0E409B19A0FE", "versionEndExcluding": "0.10.6.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}