CVE-2026-51606

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

An improper input handling vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) causes the device to abruptly terminate the TCP connection with a RST packet when a request containing an oversized field value is received, without returning any RFC 2326-compliant error response. This behavior affects the request-line URL field and header field values across multiple RTSP request types.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
24.5%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

cve_ID_report/Tenda_CP3_V3.0/Tenda_CP3_V3.0_5th/README.md at main · kkkk2222874/cve_ID_report · GitHub

https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_5th/README.md

Vendor Advisories for CVE-2026-51606(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 30× 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. 2026-07-15 19:55 UTCEG score recompute
  2. 2026-07-15 19:55 UTCGHSA enrichment
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 08:21 UTCEG score recompute
  6. 2026-07-15 08:21 UTCGHSA enrichment
  7. 2026-07-15 02:00 UTCEPSS rescore
  8. 2026-07-15 02:00 UTCEPSS rescore
  9. 2026-07-14 20:47 UTCEG score recompute
  10. 2026-07-14 20:47 UTCGHSA enrichment
  11. 2026-07-14 09:13 UTCEG score recompute
  12. 2026-07-14 09:13 UTCGHSA enrichment
  13. 2026-07-13 22:31 UTCEPSS rescore
  14. 2026-07-13 21:40 UTCEG score recompute
  15. 2026-07-13 21:40 UTCGHSA enrichment
  16. 2026-07-13 10:07 UTCEG score recompute
  17. 2026-07-13 10:06 UTCGHSA enrichment
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 06:13 UTCEPSS rescore
  20. 2026-07-12 22:31 UTCEG score recompute
  21. 2026-07-12 22:30 UTCGHSA enrichment
  22. 2026-07-12 10:56 UTCEG score recompute▲ 7.50
  23. 2026-07-12 10:56 UTCGHSA enrichment
  24. 2026-07-12 05:46 UTCEPSS rescore
  25. 2026-07-11 08:27 UTCEPSS rescore
Show 5 more
  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 17:56 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  3. 2026-07-09 17:54 UTCNVD update
  4. 2026-07-09 16:29 UTCEG score recompute
  5. 2026-07-09 16:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51606?
CVE-2026-51606 is a high vulnerability published on July 9, 2026. An improper input handling vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) causes the device to abruptly terminate the TCP connection with a RST packet when a request containing an oversized field value is received, without returning any RFC 2326-compliant error response.…
When was CVE-2026-51606 disclosed?
CVE-2026-51606 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51606 actively exploited?
CVE-2026-51606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-51606?
CVE-2026-51606 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51606, 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.

Dependency Blast Radius

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