CVE-2026-3502
TrueConf Client Download of Code Without Integrity Check Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 April 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
- EPSS
- 5.75% probability · 93th percentile
- CISA KEV
- Listed 2 April 2026 · due 16 April 2026
- Weakness
- CWE-494
- Affected
- trueconf/trueconf
- Source
- cve@checkpoint.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://trueconf.com/blog/update/trueconf-8-5 ; https://trueconf.com/downloads/windows.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-3502
References
- https://trueconf.com/blog/update/trueconf-8-5Product, Release Notes
- https://research.checkpoint.com/2026/operation-truechaos-0-day-exploitation-against-southeast-asian-government-targets/Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3502US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.