Arbitrary Code Execution in TrueConf Server for Linux by TrueConf
CVE-2026-123040

8.5HIGH

Key Information:

Vendor

Trueconf

Status
Trueconf Server
Vendor
CVE Published:
11 November 2026

What is CVE-2026-123040?

A critical vulnerability exists in TrueConf Server for Linux that allows an attacker to gain root privileges. By executing arbitrary code as the trueconf user, the attacker can potentially exploit this weakness after leveraging another vulnerability to gain initial access. This risk underscores the importance of monitoring and securing installations of TrueConf Server versions 4.7.2 through 5.5.5.

Affected Version(s)

TrueConf Server Linux 4.7.2 < 5.5.6

References

https://ics-cert.kaspersky.com/advisories/2026/11/10/true...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Vyacheslav Kopeytsev from Kaspersky ICS CERT
Grigory Sablin from Kaspersky GERT
.