critical Known exploitedREV. 01
CVE-2026-72529TrueConf Server — Unauthenticated Script Execution via Undocumented Function
TrueConf Server exposes an undocumented function on port 4307 that needs no login. Anyone who can reach that port on versions up to 5.3.9, 5.4.9 or 5.5.5 can call it and run an arbitrary script on the server.
Read the risk
THE VITAL STATS- CVSS score
- 9.3/ 10 CVSS v4.0
- EPSS probability
- 2% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2026-08-19
- Added to KEV
- 2026-08-20
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- critical
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/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
Attacker needsNetwork access to TrueConf Server on port 4307
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Exploitsecurelist.comsecurelist.com
- 04Writeupics-cert.kaspersky.comics-cert.kaspersky.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-21 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-21 | claude-code | high |
| tags | nvd.nist.gov | 2026-09-21 | human | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.