CVE-2026-33689

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{"affected": [{"affectedData": [{"product": "xrdp", "vendor": "neutrinolabs", "versions": [{"status": "affected", "version": "< 0.10.6"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*", "matchCriteriaId": "BC4D3050-83C5-4368-B1D3-534B28E0917A", "versionEndExcluding": "0.10.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service's memory space. This issue has been fixed in version 0.10.6."}, {"lang": "es", "value": "xrdp es un servidor RDP de c\u00f3digo abierto. Las versiones hasta la 0.10.5 tienen una vulnerabilidad de lectura fuera de l\u00edmites en la l\u00f3gica de an\u00e1lisis de mensajes RDP de pre-autenticaci\u00f3n. Un atacante remoto no autenticado puede desencadenar esta falla enviando una secuencia de paquetes especialmente dise\u00f1ada durante la fase de conexi\u00f3n inicial. Esta vulnerabilidad se debe a una validaci\u00f3n insuficiente de las longitudes del b\u00fafer de entrada antes de procesar la comunicaci\u00f3n del canal din\u00e1mico. La explotaci\u00f3n exitosa puede conducir a una condici\u00f3n de denegaci\u00f3n de servicio (DoS) mediante un fallo del proceso o la posible divulgaci\u00f3n de informaci\u00f3n sensible del espacio de memoria del servicio. Este problema ha sido corregido en la versi\u00f3n 0.10.6."}], "id": "CVE-2026-33689", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "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:N/VI:N/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": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33689", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-20T16:21:30.532923Z", "version": "2.0.3"}}]}, "published": "2026-04-17T21:16:32.963", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-92mr-6wpp-27jj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.10.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "xrdp", "source": "cna", "vendor": "neutrinolabs"}, "product": "xrdp", "vendor": "neutrinolabs"}], "analysis": {"en": {"generated_at": "2026-04-18T09:01:52.366481+00:00", "value": {"mitigation_remediation": ["Upgrade xrdp to version 0.10.6 or newer.", "Restrict inbound RDP traffic to trusted networks or specific IPs using firewall rules.", "Monitor xrdp logs for abnormal crashes or memory access errors to detect any lingering exploitation attempts."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service and Potential Information Disclosure"}, "threat_synthesis": {"affected_systems": "The affected product is the open\u2011source xrdp server from Neutrinolabs. Vulnerable versions are 0.10.5 and older. The issue was fixed with the release of version 0.10.6.", "description_and_impact": "xrdp includes an out-of-bounds read during the pre\u2011authentication RDP message parsing phase. An attacker can send a crafted sequence of packets before authentication is completed, causing the program to read beyond the bounds of the input buffer. The resulting memory corruption can trigger a process crash, producing a denial\u2011of\u2011service, or in some scenarios allow the attacker to read sensitive data from service memory. The flaw arises from insufficient validation of buffer lengths in the dynamic channel communication logic.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity vulnerability. EPSS data are not available, and the flaw is not listed in the CISA KEV catalog. An attacker need only be able to establish an initial RDP connection to the target system; the flaw is triggered during the pre\u2011authentication message exchange, allowing remote, unauthenticated exploitation. Given the high score and the nature of the attack vector, organizations should treat this as an urgent risk."}}}}, "created": "2026-04-17T22:00:10.828805+00:00", "updated": "2026-04-18T09:15:15.962178+00:00", "vendors": ["neutrinolabs", "neutrinolabs$PRODUCT$xrdp"]}