CVE-2026-123040

Privilege Escalation via Incorrect Permissions in TrueConf Server Linux

Published Nov 11, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
An attacker who gains the ability to execute arbitrary code on a system with TrueConf Server (Linux) versions from 4.7.2 up to, but not including, 5.5.6 installed, running as the user trueconf (by exploiting some other vulnerability), can elevate their privileges to root.

Remediation

Vendor Solution

Update TrueConf Server (Linux) to versions 5.5.6 or newer.


Vendor Workaround

Perform a full check with anti-virus software that has up-to-date anti-virus databases and software modules.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Privilege Escalation via Incorrect Permissions in TrueConf Server Linux
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Trueconf
Trueconf trueconf Server
Vendors & Products Trueconf
Trueconf trueconf Server
Type Values Removed Values Added
Title Privilege Escalation via Incorrect File Permissions in TrueConf Server (Linux)
Type Values Removed Values Added
Title Privilege Escalation via Incorrect File Permissions in TrueConf Server (Linux)
Type Values Removed Values Added
Description An attacker who gains the ability to execute arbitrary code on a system with TrueConf Server (Linux) versions from 4.7.2 up to, but not including, 5.5.6 installed, running as the user trueconf (by exploiting some other vulnerability), can elevate their privileges to root.
Weaknesses CWE-276
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Kaspersky
Published
Updated
Nov 12, 2026, 4:56 AM
Reserved
Nov 5, 2026, 7:33 AM
Status
Awaiting Analysis
Published
Nov 11, 2026, 2:17 PM
Modified
Nov 12, 2026, 7:09 PM