CVE-2026-3502TrueConf Client Update Integrity Verification Bypass
Known exploited — TrueConf Client Download of Code Without Integrity Check Vulnerability
CISA confirmed this vulnerability is used in real attacks on 02.04.2026. Remediation deadline for US federal agencies: 16.04.2026.
Required action: 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
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| trueconf | trueconf | < 8.5.3.884 | |
| TrueConf | TrueConf Client | TrueConf Client versions 8.1.0 through 8.5.2 |
References and patches
- https://trueconf.com/blog/update/trueconf-8-5 ProductRelease Notes
- https://research.checkpoint.com/2026/operation-truechaos-0-day-exploitation-against-southeast-asian-governmen… Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3502 US Government Resource
CPE matches (NVD) (1)
cpe:2.3:a:trueconf:trueconf:*:*:*:*:*:windows:*:*< 8.5.3.884