CVE-2026-55238

{
  "id": "CVE-2026-55238",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-20T17:18:07.277",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. This issue has been fixed in version 0.10.6.1."
    },
    {
      "lang": "es",
      "value": "xrdp es un servidor RDP de código abierto. Las versiones 0.10.6 y anteriores contienen una vulnerabilidad concerniente al procesamiento de RDP Confirm Active PDU, donde durante la fase de negociación de capacidades, el analizador no realizó una validación de longitud suficiente para conjuntos de capacidades específicos. Un atacante remoto y no autenticado podría potencialmente explotar esta falla enviando un paquete RDP especialmente diseñado que contenga datos de capacidad malformados. Debido a la falta de comprobaciones de límites, el proceso de xrdp puede realizar lecturas de memoria fuera de límites, lo que puede resultar en la terminación del servicio (Denegación de servicio). Sin embargo, dado que xrdp bifurca un nuevo proceso para cada conexión por defecto, es poco probable que una lectura fuera de límites que cause un fallo del proceso derribe todo el servicio de xrdp. Este problema ha sido solucionado en la versión 0.10.6.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "neutrinolabs",
          "product": "xrdp",
          "versions": [
            {
              "version": "< 0.10.6.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-20T19:01:34.582291Z",
          "id": "CVE-2026-55238",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-126"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "0.10.6.1",
              "matchCriteriaId": "A994DC5A-6181-45D2-A489-0E409B19A0FE"
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  "references": [
    {
      "url": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-mg8j-x9rw-9xv3",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
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}