CVE-2026-42542
CVE-2026-42542 is a high-severity vulnerability in Tdengine with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-191.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (41st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-36136
- Weakness: CWE-191
- Affected product: Tdengine
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-42542?
- 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.
- How severe is CVE-2026-42542?
- CVE-2026-42542 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-42542 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42542?
- CVE-2026-42542 affects Tdengine. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-42542?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-42542 have an EU (EUVD) identifier?
- Yes. CVE-2026-42542 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36136.
- When was CVE-2026-42542 published?
- CVE-2026-42542 was published on 2026-06-10 and last updated on 2026-06-17.
References
- https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6
- https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx
Affected products (1)
- cpe:2.3:a:tdengine:tdengine:*:*:*:*:*:*:*:*
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