CVE-2026-42542

HIGH 7.5CVE-2026-42542 · Published 10/06/2026 · updated 23/07/2026

In short

CVE-2026-42542 is a HIGH (CVSS 7.5) vulnerability affecting tdengine (tdengine).
Chance of exploitation in the next 30 days (EPSS): 0.56%, higher than 46.7% of all vulnerabilities.
Fix: update to 3.4.1.6 or later.

Package	Affected versions	Patched versions
tdengine tdengine	`≥ 3.4.0.0, < 3.4.1.6`	`3.4.1.6`

Description

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.

References

taosdata/TDengine release ver-3.4.1.6 · Product
taosdata/TDengine security advisory · Exploit

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