CVE-2022-26485

Estado: AnalizadaAlta (8.8)⚠ Explotación activa

Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 8.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 14%
Percentil entre todas las CVEs puntuadas: 97
Fecha de la puntuación: 5/10/2026

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).

CISA KEV — explotada activamente

Añadida al catálogo: 7/3/2022
Plazo de remediación: 21/3/2022
Uso conocido en ransomware: Unknown

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution95 %
Impacto principalT1059 Command and Scripting Interpreterexecution85 %
Impacto secundarioT1578 Modify Cloud Compute Infrastructuredefense impairment70 %

Use-after-free (CWE-416) en procesamiento XSLT de Firefox requiere interacción del usuario (UI:R) para explotación remota. Impacta ejecución de código arbitrario confirmada en ataques silvestres.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Audit User Account Management Restrict Web-Based Content Privileged Account Management Limit Software Installation Execution Prevention

Tecnologías afectadas (4)

Mozilla — Firefox Mozilla — Firefox Focus Mozilla — Firefox Mobile Mozilla — Thunderbird

CWE

CWE-416
CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-26485",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-26485",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-28T21:32:55.676135Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "97.0.2",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Mozilla",
          "product": "Firefox ESR",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "91.6.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Mozilla",
          "product": "Firefox for Android",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "97.3.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Mozilla",
          "product": "Thunderbird",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "91.6.2",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Mozilla",
          "product": "Focus",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "97.3.0",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-12-22T20:15:22.563",
  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1758062",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "security@mozilla.org"
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2022-09/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@mozilla.org"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1758062",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2022-09/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0."
    },
    {
      "lang": "es",
      "value": "La eliminación de un parámetro XSLT durante el procesamiento podría haber dado lugar a un use-after-free explotable. Hemos recibido informes de ataques en la naturaleza que abusan de esta falla. Esta vulnerabilidad afecta a Firefox &lt; 97.0.2, Firefox ESR &lt; 91.6.1, Firefox para Android &lt; 97.3.0, Thunderbird &lt; 91.6.2 y Focus &lt; 97.3.0."
    }
  ],
  "lastModified": "2026-08-19T15:29:21.807",
  "cisaActionDue": "2022-03-21",
  "cisaExploitAdd": "2022-03-07",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "43351EFE-E64C-4ACD-A779-CBADE52E35B3",
              "versionEndExcluding": "91.6.1"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E34F39EA-3536-47AE-948A-A1BE4FEBAA52",
              "versionEndExcluding": "97.0.2"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3F1EC4DF-B869-4BEB-BB9D-C629F82A9941",
              "versionEndExcluding": "97.3.0"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0BEF15CD-FD1F-464C-BDB7-72FAC9071DBC",
              "versionEndExcluding": "97.3.0"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FA3A4431-52FE-4BEE-A847-B500211A79AD",
              "versionEndExcluding": "91.6.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@mozilla.org",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Mozilla Firefox Use-After-Free Vulnerability"
}