CVE Details
CVE-2026-72529
TrueConf Server Missing Authentication for Critical Function Vulnerability
Published: 2026-08-20
CVSS: 9.3 CRITICAL
Product: TrueConf Server
Due Date: 2026-08-23
TrueConf Server contains a missing authentication for critical function vulnerability which could allow a remote unauthorized attacker with network access via port 4307/TCP to execute an arbitrary script.
GitHub PoC
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No GitHub PoC data.
FIRST EPSS
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No EPSS data.
Timeline
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Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-72529 |
| cveMetadata > | assignerOrgId | e45d732a-8f6b-4b6b-be76-7420f6a2b988 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | Kaspersky |
| cveMetadata > | dateReserved | 2026-08-10T09:55:18.375Z |
| cveMetadata > | datePublished | 2026-08-19T16:55:14.949Z |
| cveMetadata > | dateUpdated | 2026-08-20T17:48:24.155Z |
| containers > | cna > providerMetadata > orgId | e45d732a-8f6b-4b6b-be76-7420f6a2b988 |
| containers > | cna > providerMetadata > shortName | Kaspersky |
| containers > | cna > providerMetadata > dateUpdated | 2026-08-19T16:55:14.949Z |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-306 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-306: Missing Authentication for Critical Function |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > affected > 0 > vendor | TrueConf |
| containers > | cna > affected > 0 > product | TrueConf Server |
| containers > | cna > affected > 0 > platforms > 0 | Windows |
| containers > | cna > affected > 0 > platforms > 1 | Linux |
| containers > | cna > affected > 0 > versions > 0 > version | * |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 5.3 |
| containers > | cna > affected > 0 > versions > 0 > versionType | custom |
| containers > | cna > affected > 0 > versions > 1 > version | 5.3 |
| containers > | cna > affected > 0 > versions > 1 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > lessThan | 5.3.9 |
| containers > | cna > affected > 0 > versions > 1 > versionType | custom |
| containers > | cna > affected > 0 > versions > 2 > version | 5.4 |
| containers > | cna > affected > 0 > versions > 2 > status | affected |
| containers > | cna > affected > 0 > versions > 2 > lessThan | 5.4.9 |
| containers > | cna > affected > 0 > versions > 2 > versionType | custom |
| containers > | cna > affected > 0 > versions > 3 > version | 5.5 |
| containers > | cna > affected > 0 > versions > 3 > status | affected |
| containers > | cna > affected > 0 > versions > 3 > lessThan | 5.5.5 |
| containers > | cna > affected > 0 > versions > 3 > versionType | custom |
| containers > | cna > affected > 0 > defaultStatus | unaffected |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | 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. |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV4_0 > baseScore | 9.3 |
| containers > | cna > metrics > 0 > cvssV4_0 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 0 > cvssV4_0 > vectorString | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| containers > | cna > metrics > 0 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 0 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV3_1 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > scope | UNCHANGED |
| containers > | cna > metrics > 0 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > availabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 9.8 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| containers > | cna > solutions > 0 > lang | en |
| containers > | cna > solutions > 0 > value | Update TrueConf server to versions 5.3.9, 5.4.9 or 5.5.5. |
| containers > | cna > workarounds > 0 > lang | en |
| containers > | cna > workarounds > 0 > value | Perform a full check with anti-virus software that has up-to-date anti-virus databases and software modules. |
| containers > | cna > workarounds > 1 > lang | en |
| containers > | cna > workarounds > 1 > value | Conduct a scan for indicators of compromise. In the event of detecting indicators of compromise, change passwords for accounts that may have been compromised and contact Kaspersky ICS CERT at [email protected] for further instructions and assistance in investigating the incident. |
| containers > | cna > timeline > 0 > time | 2026-08-03T00:00:00.000Z |
| containers > | cna > timeline > 0 > lang | en |
| containers > | cna > timeline > 0 > value | Issue discovered by Kaspersky ICS CERT and reported to TrueConf |
| containers > | cna > timeline > 1 > time | 2026-08-04T00:00:00.000Z |
| containers > | cna > timeline > 1 > lang | en |
| containers > | cna > timeline > 1 > value | Issue confirmed by TrueConf |
| containers > | cna > timeline > 2 > time | 2026-08-07T00:00:00.000Z |
| containers > | cna > timeline > 2 > lang | en |
| containers > | cna > timeline > 2 > value | Advisory published by Kaspersky ICS CERT |
| containers > | cna > credits > 0 > lang | en |
| containers > | cna > credits > 0 > value | Vyacheslav Kopeytsev from Kaspersky ICS CERT |
| containers > | cna > credits > 0 > type | finder |
| containers > | cna > references > 0 > url | https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-missing-authentication-for-critical-function/ |
| containers > | cna > references > 0 > name | KLCERT-26-057: TrueConf Server. Missing Authentication for Critical Function |
| containers > | cna > references > 0 > tags > 0 | third-party-advisory |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-72529 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-08-20T17:44:08.693101Z |
| containers > | adp > 0 > references > 0 > url | https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/ |
| containers > | adp > 0 > references > 0 > tags > 0 | related |
| containers > | adp > 0 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72529 |
| containers > | adp > 0 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-08-20T17:48:24.155Z |