CVE-2026-42542: high-severity vulnerability in taosdata TDengine
TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
taosdata · TDengineRelated CVEs — taosdata TDengine
In the same product, most dangerous first.
CVE-2023-38502MEDIUMTDengine Database Denial-of-ServiceEPSS 0.7%CVE-2026-62349HIGHTDengine: Off-by-One Buffer OverflowEPSS 0.5%CVE-2026-62350HIGHTDengine: UDF lead to RCEEPSS 0.5%CVE-2026-62351HIGHTDengine: Unauthenticated Remote Denial of Service via Out-of-Bounds Read in transDecompressMsgEPSS 0.4%CVE-2026-62353MEDIUMTDengine: Authenticated Out-of-Bounds Read in SQL Lexer tGetTokenEPSS 0.4%CVE-2026-62348MEDIUMTDengine: KILL SSMIGRATE missing authorization lets low-privilege users interrupt shared-storage migrationsEPSS 0.3%