CVE-2021-27631

Estado: ModificadaAlta (7.5)—
SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method EnqConvUniToSrvReq() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.51%
Percentil entre todas las CVEs puntuadas: 74
Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)

SAP — Netweaver AS Abap
CWE

CWE-476
CWE-476
Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-27631",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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        "impactScore": 3.6,
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  "affected": [
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  "published": "2021-06-09T14:15:09.180",
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      "url": "https://launchpad.support.sap.com/#/notes/3020104",
      "tags": [
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        "Vendor Advisory"
      ],
      "source": "cna@sap.com"
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    {
      "url": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999",
      "tags": [
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      "source": "cna@sap.com"
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      "url": "https://launchpad.support.sap.com/#/notes/3020104",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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    {
      "lang": "en",
      "value": "SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method EnqConvUniToSrvReq() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified."
    },
    {
      "lang": "es",
      "value": "SAP NetWeaver ABAP Server y ABAP Platform (Enqueue Server), versiones - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT, 7.49, KRNL64UC - 8.04,7.22,7.22EXT, 7.49,7.53,7.73, KERNEL - 7.22,8.04 , 7.49,7.53,7.73, permite a un atacante no autenticado sin conocimiento específico del sistema enviar un paquete especialmente diseñado a través de una red que desencadenará un error interno en el sistema debido a una comprobación inapropiada de entrada en el método EnqConvUniToSrvReq() causando el bloqueo del sistema y hacer que no esté disponible.&#xa0;En este ataque, ningún dato del sistema puede ser visualizado o modificado"
    }
  ],
  "lastModified": "2026-06-17T03:45:15.930",
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