{"id":"CVE-2026-72530","published":"2026-08-19T17:21:01Z","modified":"2026-08-21T04:18:15Z","title":"TrueConf Server Code Injection Vulnerability","vendor":"TrueConf","product":"Server","tier":"core","eol":null,"description":{"text":"A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.","provenance":"source","from":"NVD"},"summary":{"text":"The TrueConf Server product contains a code injection flaw in its server component, which listens on port 4307/TCP and affects versions 5.3.X through 5.3.9, 5.4.X through 5.4.9, 5.5.X through 5.5.5, and earlier. An unauthenticated remote attacker with network access to that port can send a specially crafted script that escapes the server's isolated environment and runs arbitrary code on the host system, with no user interaction or prior authentication needed.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:31:59Z"},"cvss":{"score":9.0,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.01686,"percentile":0.76994,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-08-20","dueDate":"2026-09-03","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://trueconf.com/blog/news/security-fixes-updates-and-advisories ; https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-72530","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-08-12","exploitedFirstSeen":"2026-08-12","ransomware":false,"evidence":[{"url":"https://ics-cert.kaspersky.com/publications/reports/2026/08/12/head-mare-exploits-vulnerabilities-in-trueconf-server-to-deliver-phantomcore-malware/","date":"2026-08-12"},{"url":"https://previdian.com/CVE-2026-72530","date":"2026-08-19"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-08-20"},{"url":"https://www.recordedfuture.com/blog/august-2026-cve-landscape","date":"2026-09-08"}],"evidenceTotal":4,"provenance":"source"},"exploited":true,"otx":{"pulseCount":33,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"references":[{"url":"https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/","tags":["Third Party Advisory"]},{"url":"https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Remote network exploitation of exposed server port","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server","start":0,"end":91}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Arbitrary code execution on host system","mappingType":"primary_impact","evidence":[{"from":"description","quote":"could use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system","start":161,"end":284}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-62588","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-62588","exploited":true,"exploitedSince":"2026-08-20","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-08-25","earliestUrl":"https://github.com/fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-","repos":[{"name":"fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-","url":"https://github.com/fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-","stars":0,"created":"2026-08-25"}]},"first":{"date":"2026-08-25","source":"PoC-in-GitHub","url":"https://github.com/fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-"},"provenance":"source"},"exploitRefs":["https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-08-12","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://ics-cert.kaspersky.com/publications/reports/2026/08/12/head-mare-exploits-vulnerabilities-in-trueconf-server-to-deliver-phantomcore-malware/","provenance":"source"},{"date":"2026-08-19","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72530","provenance":"source"},{"date":"2026-08-20","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-08-20","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-62588","provenance":"source"},{"date":"2026-08-25","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-","provenance":"source"}],"speed":{"daysToPublicExploit":6,"firstExploitFrom":"PoC-in-GitHub","daysToKev":1},"priority":{"score":74.7,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":10.0,"detail":"added 80 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":15.4,"detail":"percentile 0.7699"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"33 pulses"},{"name":"CVSS severity","points":6.3,"detail":"base score 9.0"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}