← CVE catalog

CVE-2026-3502

High CVSS 7.8 Known exploited

Published 2026-03-30 · last changed 2026-06-17 · added to CISA KEV 2026-04-02

This one is being exploited in the wild.

CISA added CVE-2026-3502 to the Known Exploited Vulnerabilities catalog on 2026-04-02. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2026-3502, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

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