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CVE-2026-77587

Estado: AnalizadaAlta (7.5)—

Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a client. This is TROVE-2026-026.

CVSS

Probabilidad de explotación (EPSS)

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).

🎯 Técnicas ATT&CK

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

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Torproject — TOR

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-77587",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-77587",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-25T19:08:45.475220Z"
        }
      }
    ],
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          "userInteraction": "NONE",
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  "published": "2026-08-20T21:17:10.957",
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      "tags": [
        "Permissions Required",
        "Release Notes",
        "Vendor Advisory"
      ],
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
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          "lang": "en",
          "value": "CWE-911"
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    {
      "type": "Primary",
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      "description": [
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          "lang": "en",
          "value": "CWE-416"
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      "lang": "en",
      "value": "Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a client. This is TROVE-2026-026."
    }
  ],
  "lastModified": "2026-09-16T14:09:19.390",
  "configurations": [
    {
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        {
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  "sourceIdentifier": "cve@mitre.org"
}