{"id":"CVE-2026-72529","published":"2026-08-19T17:21:00Z","modified":"2026-08-21T04:18:15Z","title":"TrueConf Server Missing Authentication for Critical Function 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 execute an arbitrary script by calling an undocumented function.","provenance":"source","from":"NVD"},"summary":{"text":"TrueConf Server contains a missing authentication flaw in an undocumented function that lets remote, unauthenticated parties reach critical functionality. An attacker with network access to port 4307/TCP on affected 5.3.x, 5.4.x and 5.5.x versions, and earlier, can run an arbitrary script by calling that function, with no user interaction or prior authentication required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:32:02Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.01464,"percentile":0.7365,"date":"2026-10-31","provenance":"source"},"kev":{"dateAdded":"2026-08-20","dueDate":"2026-08-23","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-missing-authentication-for-critical-function/ ; 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-2026-72529","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-2026-72529","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":null,"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"references":[{"url":"https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-missing-authentication-for-critical-function/","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-2026-72529","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: Unauthenticated network exploitation of exposed server","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"A remote unauthorized attacker with network access via port 4307/TCP","start":0,"end":68}],"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 script execution via undocumented function","mappingType":"primary_impact","evidence":[{"from":"description","quote":"could execute an arbitrary script by calling an undocumented function","start":161,"end":230}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-62587","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-62587","exploited":true,"exploitedSince":"2026-08-20","provenance":"source"},"exploits":[],"exploitSources":null,"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-2026-72529","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-2026-62587","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":1},"priority":{"score":71.6,"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 81 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":14.73,"detail":"percentile 0.7365"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}