PatchSiren cyber security CVE debrief

CVE-2026-42542 taosdata CVE debrief

CVE-2026-42542 is a HIGH severity vulnerability in TDengine, an open source time-series database optimized for Internet of Things devices. Versions 3.4.0.0 through 3.4.1.5 are vulnerable. 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. The issue is fixed in version 3.4.1.6.

Vendor: taosdata
Product: TDengine
CVSS: HIGH 7.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-10
Original CVE updated: 2026-06-12
Advisory published: 2026-06-10
Advisory updated: 2026-06-12

Who should care

Users of TDengine versions 3.4.0.0 through 3.4.1.5 should update to version 3.4.1.6 to prevent unauthenticated remote crashes of the taosd server process.

Technical summary

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. CWE-191. An unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet.

Defensive priority

HIGH

Recommended defensive actions

Update TDengine to version 3.4.1.6 or later.

Evidence notes

CVE-2026-42542 was published on [cvePublishedAt] and modified on [cveModifiedAt].

Sources and references

Verified primary and authoritative sources

CVE-2026-42542 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-42542

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-42542 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42542

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6

[email protected] - Product, Release Notes
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx

[email protected] - Exploit, Mitigation, Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.