{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-72530",
  "revision": 1,
  "title": "TrueConf Server — Isolated Environment Breakout to Host Code Execution",
  "summary": "A code injection flaw in TrueConf Server (5.3.x up to 5.3.9, 5.4.x up to 5.4.9, 5.5.x up to 5.5.5 and earlier) lets an unauthenticated attacker who can reach port 4307 send a crafted script that escapes the server's isolated environment and runs arbitrary code on the host.",
  "source_type": "cve",
  "severity": "critical",
  "cvss": {
    "score": 9.5,
    "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
    "version": "4.0"
  },
  "epss": 0.01827,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": true,
    "attack_complexity": "high",
    "kev_added": "2026-08-20",
    "prerequisites": "Network access to TrueConf Server on port 4307; no credentials required"
  },
  "mitre_attack": [
    "T1190",
    "T1059"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Update TrueConf Server per the vendor's security advisory, block port 4307 from untrusted networks until then, and check the host for signs of compromise.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-72530",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2026-72530",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-72530",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "claude-code"
    },
    {
      "fields": [
        "tags"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-72530",
      "retrieved_at": "2026-09-21T07:15:12.147Z",
      "confidence": "high",
      "extractor": "human"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72530",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "exploit",
      "url": "https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/"
    },
    {
      "type": "writeup",
      "url": "https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/"
    }
  ],
  "published_at": "2026-08-19T17:21:01.130Z",
  "issued_at": "2026-09-21T07:05:11.841Z",
  "tags": [
    "trueconf",
    "code-injection",
    "sandbox-escape",
    "rce",
    "video-conferencing"
  ]
}