What’s Vulnerable › Vulnerabilities

CVE-2026-3502: TrueConf Client Download of Code Without Integrity Check Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-04-02
• EPSS: 5.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-30 · updated 2026-06-17
• Weakness: CWE-494

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.

Affected products

• TrueConf Client: before 8.5.3.884 — fixed in 8.5.3.884

How to fix

Upgrade to a fixed version: TrueConf Client 8.5.3.884. Check the vendor advisory for mitigations.

References

• https://trueconf.com/blog/update/trueconf-8-5
• https://research.checkpoint.com/2026/operation-truechaos-0-day-exploitation-against-southeast-asian-government-targets/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3502

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