CVE-2026-18262

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "RAS Client", "vendor": "Parallels", "versions": [{"status": "affected", "version": "21.0.26296"}]}], "source": "zdi-disclosures@trendmicro.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Parallels RAS Client. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.\n\nThe specific flaw exists within the RAS RDP Backend Service. The issue results from an exposed dangerous function. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28885."}, {"lang": "es", "value": "Vulnerabilidad de escalada de privilegios local por funci\u00f3n peligrosa expuesta en el servicio de backend RDP del cliente Parallels RAS. Esta vulnerabilidad permite a atacantes locales escalar privilegios en instalaciones afectadas de Parallels RAS Client. Un atacante debe primero obtener la capacidad de ejecutar c\u00f3digo con privilegios bajos en el sistema objetivo para explotar esta vulnerabilidad.\n\nLa falla espec\u00edfica existe dentro del servicio de backend RDP de RAS. El problema resulta de una funci\u00f3n peligrosa expuesta. Un atacante puede aprovechar esta vulnerabilidad para escalar privilegios y ejecutar c\u00f3digo arbitrario en el contexto de SYSTEM. Fue ZDI-CAN-28885."}], "id": "CVE-2026-18262", "lastModified": "2026-10-18T20:10:00.110", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18262", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T19:52:29.751247Z", "version": "2.0.3"}}]}, "published": "2026-08-20T17:17:22.653", "references": [{"source": "zdi-disclosures@trendmicro.com", "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-555/"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-749"}], "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "21.0.26296"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "RAS Client", "source": "cna", "vendor": "Parallels"}, "product": "ras_client", "vendor": "parallels"}], "created": "2026-08-20T20:00:05.759056+00:00", "updated": "2026-08-21T12:08:50.905868+00:00", "vendors": ["parallels", "parallels$PRODUCT$ras_client"]}