CVE-2026-3502

high

Description

TrueConf Client downloads application update code and applies it without performing verification. An attacker who is able to influence the update delivery path can substitute a tampered update payload. If the payload is executed or installed by the updater, this may result in arbitrary code execution in the context of the updating process or user.

References

https://research.checkpoint.com/2026/operation-truechaos-0-day-exploitation-against-southeast-asian-government-targets/

https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-actively-exploited-trueconf-server-flaws/

https://thehackernews.com/2026/08/head-mare-exploits-trueconf-flaws-to.html

https://www.bleepingcomputer.com/news/security/hackers-breach-trueconf-to-trojanize-client-installers-with-backdoors/

https://securityaffairs.com/190341/security/u-s-cisa-adds-a-flaw-in-trueconf-client-to-its-known-exploited-vulnerabilities-catalog.html

https://www.securityweek.com/trueconf-zero-day-exploited-in-asian-government-attacks/

https://www.helpnetsecurity.com/2026/04/02/trueconf-zero-day-vulnerability-cyber-espionage/

https://www.cisa.gov/news-events/alerts/2026/04/02/cisa-adds-one-known-exploited-vulnerability-catalog

https://www.bleepingcomputer.com/news/security/hackers-exploit-trueconf-zero-day-to-push-malicious-software-updates/

https://thehackernews.com/2026/03/trueconf-zero-day-exploited-in-attacks.html

https://github.com/packet-noir/kev_rec

https://github.com/packet-noir/kev-rec

https://github.com/althacksec/CVE_Spotlight

https://github.com/fevar54/CVE-2026-3502-Scanner---TrueConf-Vulnerability-Detection-Tool

https://github.com/fevar54/CVE-2026-3502---TrueConf-Client-Update-Hijacking-PoC

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3502

https://trueconf.com/blog/update/trueconf-8-5

Details

Source: Mitre, NVD

Published: 2026-03-30

Updated: 2026-04-03

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 6.9

Vector: CVSS2#AV:A/AC:L/Au:M/C:C/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

Severity: High

EPSS

EPSS: 0.00009

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest

Detections

Analytics