CVE-2026-74843

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function strcpy of the file /etc/lighttpd/www/cgi-bin/export_pingortrace.cgi of the component Export Pingortrace CGI. Executing a manipulation of the argument HTTP_COOKIE can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
No patch confirmed yet.
generic

WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/CVE-Report-WAVLINK-WN535M1-RCE.pdf at main · wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow · GitHub

https://github.com/wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/blob/main/CVE-Report-WAVLINK-WN535M1-RCE.pdf

Vendor Advisories for CVE-2026-74843(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 38× in last 7d / 38× 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. 2026-08-21 05:45 UTCGHSA enrichment
  2. 2026-08-21 01:34 UTCEG score recompute
  3. 2026-08-21 01:34 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 21:24 UTCGHSA enrichment
  6. 2026-08-20 17:14 UTCGHSA enrichment
  7. 2026-08-20 12:59 UTCGHSA enrichment
  8. 2026-08-20 11:28 UTCGHSA enrichment
  9. 2026-08-20 07:17 UTCGHSA enrichment
  10. 2026-08-20 03:07 UTCGHSA enrichment
  11. 2026-08-19 22:56 UTCGHSA enrichment
  12. 2026-08-19 18:45 UTCEG score recompute
  13. 2026-08-19 18:45 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 14:34 UTCGHSA enrichment
  16. 2026-08-19 10:15 UTCGHSA enrichment
  17. 2026-08-19 06:04 UTCGHSA enrichment
  18. 2026-08-19 01:49 UTCGHSA enrichment
  19. 2026-08-18 21:36 UTCGHSA enrichment
  20. 2026-08-18 16:58 UTCEG score recompute
  21. 2026-08-18 16:58 UTCGHSA enrichment
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 12:40 UTCGHSA enrichment
  25. 2026-08-18 08:14 UTCGHSA enrichment
Show 13 more
  1. 2026-08-18 03:54 UTCGHSA enrichment
  2. 2026-08-17 23:43 UTCGHSA enrichment
  3. 2026-08-17 19:31 UTCGHSA enrichment
  4. 2026-08-17 15:20 UTCEG score recompute
  5. 2026-08-17 15:20 UTCGHSA enrichment
  6. 2026-08-17 15:20 UTCNVD updateCVSS v4 → 9.3
  7. 2026-08-17 15:15 UTCEG score recompute
  8. 2026-08-17 15:15 UTCGHSA enrichment
  9. 2026-08-17 15:14 UTCMITRE cvelistV5CVSS v4 → 10
  10. 2026-08-17 12:25 UTCEG score recompute
  11. 2026-08-17 12:25 UTCNVD updateCVSS v4 → 9.3
  12. 2026-08-17 11:26 UTCEG score recompute
  13. 2026-08-17 11:26 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74843?
CVE-2026-74843 is a critical vulnerability published on August 17, 2026. A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function strcpy of the file /etc/lighttpd/www/cgi-bin/exportpingortrace.cgi of the component Export Pingortrace CGI. Executing a manipulation of the argument HTTPCOOKIE can lead to…
When was CVE-2026-74843 disclosed?
CVE-2026-74843 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74843 actively exploited?
CVE-2026-74843 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 40.9% of all scored CVEs.
What is the CVSS score of CVE-2026-74843?
CVE-2026-74843 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-74843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74843, 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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