CVE-2026-42542

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.5
EG Score
7.5(medium)
EPSS
41.6%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 12, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS) · Advisory · taosdata/TDengine · GitHub

https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx
github_release Patch Available

3.4.1.6

Patch available: taosdata/TDengine ver-3.4.1.6

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 94× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 05:46 UTCEPSS rescore
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  3. 2026-07-11 16:27 UTCEG score recompute
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  1. 2026-07-03 14:52 UTCEG score recompute
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  73. 2026-06-10 23:01 UTCEG score recompute
  74. 2026-06-10 23:00 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-42542?
CVE-2026-42542 is a high vulnerability published on June 10, 2026. 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…
When was CVE-2026-42542 disclosed?
CVE-2026-42542 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42542 actively exploited?
CVE-2026-42542 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 41.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42542?
CVE-2026-42542 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-42542?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42542, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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