Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
taosdata TDengine — TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N N H 7.5 .0054 43.1 —
AFFECTED
Product Versions Fixed
TDengine >= 3.4.0.0, < 3.4.1.6 – —
TIMELINE
Apr 28 Reserved by GitHub_M
Jun 10 EXPLOIT PUBLISHED — CVE-2026-42542 (taosdata TDengine). Public exploit reference added.
Jun 10 Published (CNA: GitHub_M)
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| April 28, 2026 | Reserved | Reserved by GitHub_M |
| June 10, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-42542 (taosdata TDengine). Public exploit reference added. |
| June 10, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| taosdata | TDengine | — | >= 3.4.0.0, < 3.4.1.6 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42542 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.