CVE-2026-42542: Tdengine

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

TDengine is an open source, time-series database optimized for Internet of Things devices. In versions 3.4.0.0 through 3.4.1.5, an unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet. No credentials or prior session state are required. Version 3.4.1.6 fixes the issue.

Affected products

• Tdengine Tdengine: from 3.4.0.0, before 3.4.1.6 (fixed in 3.4.1.6)

Published 2026-06-10. Last modified 2026-07-23.