CVE-2026-42542
TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-191 |
| Vendor | taosdata |
| Product | tdengine |
| Published | Jun 10, 2026 |
Stay Ahead of the Next One
Get instant alerts for taosdata tdengine
Be the first to know when new high vulnerabilities affecting taosdata tdengine are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
taosdata / TDengine
>= 3.4.0.0, < 3.4.1.6