CVE-2026-41926

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 33% 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, nvd
Elevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.3Exploit: Elevated riskExposed: 0

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

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the firewall.cgi binary across five request handlers that apply insufficient input validation. Attackers can inject arbitrary shell commands through vulnerable parameters like websURLFilter, websHostFilter, portForward, singlePortForward, and ipportFilter using subshell syntax or unfiltered parameters, with payloads persisting in NVRAM and re-executing on every subsequent firewall.cgi request.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
73(Attend)
EG Risk 73/100SSVC: 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
Severity93% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
67%
KEV
Not listed

Published

May 4, 2026

Last Modified

May 5, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

WDR201A WiFi Extender OS Command Injection via firewall.cgi | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wdr201a-wifi-extender-os-command-injection-via-firewall-cgi
generic

Oscilloscope Manufacturer, Measurement & Analysis Instruments, Mini Oscilloscope Supplier - Shenzhen Yipu Commercial and Trading Co., Ltd

https://www.made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China
generic

Teaching the Machine Where to Look: Scaling Embedded Vulnerability Research with AI | Street #CySec - Tales of a cybersecurity journey

https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× 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.

Showing the most recent 100 of 272 total refreshes for this CVE.

  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 15:01 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 09:37 UTCEPSS rescore
  5. 2026-09-10 09:34 UTCEPSS rescore
  6. 2026-09-08 22:00 UTCEPSS rescore
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:12 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-09-01 04:39 UTCEPSS rescore
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 14:25 UTCEPSS rescore
  17. 2026-08-26 14:46 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-23 21:16 UTCEG score recompute
  20. 2026-08-23 21:16 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-21 23:49 UTCEPSS rescore
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-19 17:03 UTCEPSS rescore
  25. 2026-08-18 13:48 UTCEPSS rescore
Show 75 more
  1. 2026-08-17 13:47 UTCEPSS rescore
  2. 2026-08-17 13:06 UTCEG score recompute
  3. 2026-08-17 13:06 UTCGHSA enrichment
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 09:14 UTCGHSA enrichment
  6. 2026-08-16 05:02 UTCEG score recompute
  7. 2026-08-16 05:02 UTCGHSA enrichment
  8. 2026-08-16 02:14 UTCEPSS rescore
  9. 2026-08-15 01:30 UTCEPSS rescore
  10. 2026-08-14 23:04 UTCGHSA enrichment
  11. 2026-08-14 19:11 UTCGHSA enrichment
  12. 2026-08-14 15:17 UTCGHSA enrichment
  13. 2026-08-14 11:23 UTCGHSA enrichment
  14. 2026-08-14 07:30 UTCGHSA enrichment
  15. 2026-08-14 03:37 UTCEG score recompute
  16. 2026-08-14 03:37 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 10:51 UTCGHSA enrichment
  19. 2026-08-13 06:35 UTCGHSA enrichment
  20. 2026-08-13 01:13 UTCGHSA enrichment
  21. 2026-08-12 21:19 UTCGHSA enrichment
  22. 2026-08-12 17:14 UTCEG score recompute
  23. 2026-08-12 17:14 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-12 00:09 UTCGHSA enrichment
  26. 2026-08-11 20:09 UTCGHSA enrichment
  27. 2026-08-11 16:08 UTCEG score recompute
  28. 2026-08-11 16:08 UTCGHSA enrichment
  29. 2026-08-11 13:43 UTCEPSS rescore
  30. 2026-08-11 05:32 UTCGHSA enrichment
  31. 2026-08-11 01:39 UTCEG score recompute
  32. 2026-08-11 01:39 UTCGHSA enrichment
  33. 2026-08-11 00:00 UTCEPSS rescore
  34. 2026-08-10 13:58 UTCGHSA enrichment
  35. 2026-08-10 09:51 UTCGHSA enrichment
  36. 2026-08-10 05:58 UTCGHSA enrichment
  37. 2026-08-10 02:04 UTCGHSA enrichment
  38. 2026-08-09 22:11 UTCGHSA enrichment
  39. 2026-08-09 18:17 UTCGHSA enrichment
  40. 2026-08-09 14:24 UTCEG score recompute
  41. 2026-08-09 14:24 UTCGHSA enrichment
  42. 2026-08-09 13:46 UTCEPSS rescore
  43. 2026-08-09 10:30 UTCGHSA enrichment
  44. 2026-08-09 06:37 UTCGHSA enrichment
  45. 2026-08-09 02:43 UTCEG score recompute
  46. 2026-08-09 02:43 UTCGHSA enrichment
  47. 2026-08-08 16:37 UTCEPSS rescore
  48. 2026-08-08 10:53 UTCGHSA enrichment
  49. 2026-08-08 06:49 UTCGHSA enrichment
  50. 2026-08-08 02:56 UTCGHSA enrichment
  51. 2026-08-07 23:02 UTCGHSA enrichment
  52. 2026-08-07 19:09 UTCEG score recompute
  53. 2026-08-07 19:09 UTCGHSA enrichment
  54. 2026-08-07 15:15 UTCGHSA enrichment
  55. 2026-08-07 11:21 UTCGHSA enrichment
  56. 2026-08-07 02:12 UTCGHSA enrichment
  57. 2026-08-06 20:53 UTCGHSA enrichment
  58. 2026-08-06 17:00 UTCEG score recompute
  59. 2026-08-06 17:00 UTCGHSA enrichment
  60. 2026-08-06 13:46 UTCEPSS rescore
  61. 2026-08-06 10:11 UTCGHSA enrichment
  62. 2026-08-06 06:15 UTCGHSA enrichment
  63. 2026-08-06 02:21 UTCGHSA enrichment
  64. 2026-08-05 22:28 UTCEG score recompute
  65. 2026-08-05 22:28 UTCGHSA enrichment
  66. 2026-08-05 19:17 UTCEPSS rescore
  67. 2026-08-04 15:10 UTCEPSS rescore
  68. 2026-08-04 10:38 UTCEPSS rescore
  69. 2026-08-04 03:52 UTCGHSA enrichment
  70. 2026-08-03 23:54 UTCGHSA enrichment
  71. 2026-08-03 20:01 UTCEG score recompute
  72. 2026-08-03 20:01 UTCGHSA enrichment
  73. 2026-08-03 10:36 UTCEPSS rescore
  74. 2026-08-03 01:27 UTCGHSA enrichment
  75. 2026-08-02 21:33 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-41926?
CVE-2026-41926 is a critical vulnerability published on May 4, 2026. WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the firewall.cgi binary across five request handlers that apply insufficient input validation. Attackers can inject arbitrary shell commands through vulnerable parameters like websURLFilter,…
When was CVE-2026-41926 disclosed?
CVE-2026-41926 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41926 actively exploited?
CVE-2026-41926 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 32.7% of all scored CVEs.
What is the CVSS score of CVE-2026-41926?
CVE-2026-41926 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-41926?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41926, 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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