Integer overflow in Taosdata Tdengine
CVE-2026-42542
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Taosdata Tdengine — versions >= 3.4.0.0, < 3.4.1.6
- Tdengine
Weakness classification (CWE)
References
- github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6 (Product, Release Notes)
- github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-42542?
- CVE-2026-42542 is a high-severity vulnerability in Taosdata Tdengine, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-06-10.
- How severe is CVE-2026-42542?
- High severity. CVSS v3 base score is 7.5 out of 10.