CVE-2026-42542
TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
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.
INFO
Published Date :
June 10, 2026, 10:16 p.m.
Last Modified :
July 23, 2026, 9:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update TDengine to version 3.4.1.6 or newer.
- Apply the vendor-supplied patch.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42542.
| URL | Resource |
|---|---|
| https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6 | Product Release Notes |
| https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42542 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42542
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42542 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42542 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: TDengine de taosdata, Description: TDengine es una base de datos de series temporales de código abierto optimizada para dispositivos de internet de las cosas. En las versiones 3.4.0.0 a 3.4.1.5, un atacante remoto no autenticado puede bloquear el proceso del servidor taosd enviando un único paquete RPC manipulado. No se requieren credenciales ni estado de sesión previo. La versión 3.4.1.6 corrige el problema. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'taosdata', 'product': 'TDengine', 'versions': [{'status': 'affected', 'version': '>= 3.4.0.0, < 3.4.1.6'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-42542', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-11T12:56:59.511171Z'} -
Initial Analysis by [email protected]
Jun. 12, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:tdengine:tdengine:*:*:*:*:*:*:*:* versions from (including) 3.4.0.0 up to (excluding) 3.4.1.6 Added Reference Type GitHub, Inc.: https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Jun. 10, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-191 Added Reference https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6 Added Reference https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx