CVE-2026-42542CWE-191

TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)

High · published June 10, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
45.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00558 · 45.7th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-06-10T20:32Z
EPSS history
Timeline
  • 10 JUN 20:32Z
    TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
    cvelistv5