CVE-2021-39275

Estado: AnalizadaCrítica (9.8)—
ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 9.8
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 39%
Percentil entre todas las CVEs puntuadas: 99
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 (11)

Apache — Http Server Debian — Debian Linux Fedoraproject — Fedora Netapp — Cloud Backup Netapp — Clustered Data Ontap Netapp — Storagegrid Oracle — Http Server Oracle — Instantis Enterprisetrack Oracle — ZFS Storage Appliance KIT Siemens — Sinec NMS Siemens — Sinema Server
CWE

CWE-787
Referencias

JSON original (NVD)

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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
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  "descriptions": [
    {
      "lang": "en",
      "value": "ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier."
    },
    {
      "lang": "es",
      "value": "la función ap_escape_quotes() puede escribir más allá del final de un buffer cuando se le da una entrada maliciosa. Ningún módulo incluido pasa datos no confiables a estas funciones, pero los módulos externos o de terceros pueden hacerlo. Este problema afecta a Apache HTTP Server versiones 2.4.48 y anteriores"
    }
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  "lastModified": "2026-06-17T04:03:27.313",
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