01 Record
CVE-2026-72530
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
CriticalKEVPUBLISHEDCNA: Kaspersky
CNA base score9.5 CVSS v4.0CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
02 Description
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
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-08-20. Federal remediation due 2026-09-03.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 1.68% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 76.5% of scored records. A rank, not a probability.
- NVD base score
- 9.5 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS 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
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-08-21.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-19 16:56Z2 MO AGO
- Last updated
- 2026-08-21 03:55Z2 MO AGO
- Reserved
- 2026-08-10
- Assigning CNA
- Kaspersky
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.5)
- CNA CVSS 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
- Weaknesses
- CWE-94Improper Control of Generation of Code ('Code Injection')Base
- Data version
- 5.2
- Document digest
- e803b24f6a93c8e54cf9680964b7fffcff994b15c6dbd3b546e9e7421df37b33
05 Affected products
VendorProductVersionsPlatforms
06 References
- ics-cert.kaspersky.comKLCERT-26-058: TrueConf Server. Break out of the isolated environmenthttps://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/
- securelist.comhttps://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530
07 Remediation
Update TrueConf server to versions 5.3.9, 5.4.9 or 5.5.5.