CVE-2026-15701

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-14. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

A weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. Affected by this issue is the function Form_Logout of the file /formLogout.htm of the component lighttpd. This manipulation of the argument Host causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 25, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

TOTOLINK | Wi-Fi 7, Mesh, 5G & Enterprise Networking

https://www.totolink.net/
generic🟡 PoC Available

TOTOLINK_NR1800X_V9.1.0u.6279_B20210910_Buffer_Overflow_EN · Issue #1 · fu9-dotom/cve · GitHub

https://github.com/fu9-dotom/cve/issues/1

Vendor Advisories for CVE-2026-15701(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 49× 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. 2026-07-27 16:58 UTCEG score recompute
  2. 2026-07-27 16:58 UTCGHSA enrichment
  3. 2026-07-27 14:13 UTCEPSS rescore
  4. 2026-07-27 13:19 UTCGHSA enrichment
  5. 2026-07-27 09:41 UTCGHSA enrichment
  6. 2026-07-27 06:03 UTCGHSA enrichment
  7. 2026-07-27 02:18 UTCGHSA enrichment
  8. 2026-07-26 22:38 UTCGHSA enrichment
  9. 2026-07-26 19:01 UTCGHSA enrichment
  10. 2026-07-26 15:23 UTCEG score recompute
  11. 2026-07-26 15:23 UTCGHSA enrichment
  12. 2026-07-26 14:54 UTCEPSS rescore
  13. 2026-07-26 14:54 UTCEPSS rescore
  14. 2026-07-26 11:45 UTCEG score recompute
  15. 2026-07-26 11:45 UTCGHSA enrichment
  16. 2026-07-25 14:17 UTCEPSS rescore
  17. 2026-07-24 14:17 UTCEPSS rescore
  18. 2026-07-23 14:18 UTCEPSS rescore
  19. 2026-07-23 03:05 UTCEG score recompute
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-21 15:24 UTCEPSS rescore
  22. 2026-07-20 17:08 UTCEPSS rescore
  23. 2026-07-19 14:30 UTCEPSS rescore
  24. 2026-07-19 02:28 UTCEPSS rescore
  25. 2026-07-18 10:04 UTCEPSS rescore
Show 24 more
  1. 2026-07-17 06:30 UTCGHSA enrichment
  2. 2026-07-17 02:52 UTCGHSA enrichment
  3. 2026-07-16 23:13 UTCGHSA enrichment
  4. 2026-07-16 19:36 UTCGHSA enrichment
  5. 2026-07-16 17:02 UTCEPSS rescore
  6. 2026-07-16 15:58 UTCGHSA enrichment
  7. 2026-07-16 12:19 UTCGHSA enrichment
  8. 2026-07-16 08:40 UTCGHSA enrichment
  9. 2026-07-16 05:03 UTCGHSA enrichment
  10. 2026-07-16 01:25 UTCGHSA enrichment
  11. 2026-07-15 21:47 UTCGHSA enrichment
  12. 2026-07-15 18:08 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 16:23 UTCNVD updateCVSS v4 → 8.9
  15. 2026-07-15 15:19 UTCMITRE cvelistV5CVSS v4 → 9.3
  16. 2026-07-15 14:31 UTCGHSA enrichment
  17. 2026-07-15 10:52 UTCGHSA enrichment
  18. 2026-07-15 07:14 UTCGHSA enrichment
  19. 2026-07-15 03:36 UTCGHSA enrichment
  20. 2026-07-14 23:57 UTCGHSA enrichment
  21. 2026-07-14 20:19 UTCGHSA enrichment
  22. 2026-07-14 17:20 UTCNVD updateCVSS v4 → 8.9
  23. 2026-07-14 16:40 UTCEG score recompute
  24. 2026-07-14 16:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15701?
CVE-2026-15701 is a critical vulnerability published on July 14, 2026. A weakness has been identified in Totolink NR1800X 9.1.0u.6279B20210910. Affected by this issue is the function FormLogout of the file /formLogout.htm of the component lighttpd. This manipulation of the argument Host causes stack-based buffer overflow. The attack is possible to be carried out…
When was CVE-2026-15701 disclosed?
CVE-2026-15701 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15701 actively exploited?
CVE-2026-15701 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 47.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15701?
CVE-2026-15701 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-15701?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15701, 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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