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CISA has added CVE-2026-3502, a vulnerability in TrueConf Client involving the download of code without integrity checks, to its Known Exploited Vulnerabilities (KEV) Catalog due to active exploitation. Organizations are strongly urged to prioritize timely remediation to reduce their exposure to potential cyberattacks.
Check Point Research discovered a zero-day vulnerability (CVE-2026-3502) in the TrueConf client update mechanism, exploited in 'Operation TrueChaos' against Southeast Asian governments. Attackers compromised on-premises TrueConf servers to distribute malicious updates, utilizing DLL sideloading and UAC bypass techniques to deploy the Havoc C2 framework.
