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 56% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 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)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 23, 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 7× in last 7d / 31× 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.

Showing the most recent 100 of 128 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 04:13 UTCEG score recompute
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-12 15:01 UTCEPSS rescore
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  14. 2026-08-31 00:09 UTCEG score recompute
  15. 2026-08-30 19:17 UTCEPSS rescore
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  21. 2026-08-25 00:18 UTCEG score recompute
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  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-21 07:42 UTCEG score recompute
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  1. 2026-08-20 22:55 UTCEPSS rescore
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  3. 2026-08-19 17:03 UTCEPSS rescore
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  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-16 23:28 UTCEG score recompute
  8. 2026-08-16 14:56 UTCEPSS rescore
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  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 10:50 UTCEG score recompute
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  13. 2026-08-13 22:15 UTCEG score recompute
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  15. 2026-08-12 19:53 UTCEG score recompute
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  17. 2026-08-11 21:29 UTCEG score recompute
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  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 00:44 UTCEG score recompute
  22. 2026-08-09 13:46 UTCEPSS rescore
  23. 2026-08-09 02:21 UTCEG score recompute
  24. 2026-08-08 16:37 UTCEPSS rescore
  25. 2026-08-07 16:47 UTCEG score recompute
  26. 2026-08-06 18:24 UTCEG score recompute
  27. 2026-08-06 13:46 UTCEPSS rescore
  28. 2026-08-05 20:00 UTCEG score recompute
  29. 2026-08-05 19:17 UTCEPSS rescore
  30. 2026-08-04 15:53 UTCEG score recompute
  31. 2026-08-04 15:10 UTCEPSS rescore
  32. 2026-08-04 10:38 UTCEPSS rescore
  33. 2026-08-03 14:50 UTCEG score recompute
  34. 2026-08-03 10:36 UTCEPSS rescore
  35. 2026-08-02 08:03 UTCEG score recompute
  36. 2026-08-02 02:27 UTCEPSS rescore
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  38. 2026-08-01 04:16 UTCEPSS rescore
  39. 2026-07-31 00:42 UTCEG score recompute
  40. 2026-07-30 16:28 UTCEPSS rescore
  41. 2026-07-30 09:45 UTCEG score recompute
  42. 2026-07-30 01:30 UTCEPSS rescore
  43. 2026-07-29 04:55 UTCEG score recompute
  44. 2026-07-28 15:36 UTCEPSS rescore
  45. 2026-07-28 02:16 UTCEG score recompute
  46. 2026-07-27 14:13 UTCEPSS rescore
  47. 2026-07-26 20:55 UTCEG score recompute
  48. 2026-07-26 14:54 UTCEPSS rescore
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  50. 2026-07-26 05:18 UTCEG score recompute
  51. 2026-07-25 14:18 UTCEPSS rescore
  52. 2026-07-24 14:17 UTCEPSS rescore
  53. 2026-07-23 14:18 UTCEPSS rescore
  54. 2026-07-23 03:11 UTCEG score recompute
  55. 2026-07-22 14:08 UTCEPSS rescore
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  60. 2026-07-18 10:04 UTCEPSS rescore
  61. 2026-07-16 17:03 UTCEPSS rescore
  62. 2026-07-15 16:57 UTCEPSS rescore
  63. 2026-07-15 02:00 UTCEPSS rescore
  64. 2026-07-13 22:30 UTCEPSS rescore
  65. 2026-07-13 06:13 UTCEPSS rescore
  66. 2026-07-12 05:46 UTCEPSS rescore
  67. 2026-07-11 08:27 UTCEPSS rescore
  68. 2026-07-09 19:10 UTCEPSS rescore
  69. 2026-07-08 15:15 UTCEPSS rescore
  70. 2026-07-07 13:46 UTCEPSS rescore
  71. 2026-07-06 16:27 UTCEPSS rescore
  72. 2026-07-06 16:27 UTCEPSS rescore
  73. 2026-07-06 02:23 UTCEPSS rescore
  74. 2026-07-06 02:23 UTCEPSS rescore
  75. 2026-07-05 02:30 UTCEPSS rescore

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 July 23, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 56.2% of all scored CVEs.
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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