CVE-2026-19509

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-19. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

Improper input validation in ajaxSet_wireless_network_configuration.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows an authenticated attacker to cause denial of service via a crafted ssid_number parameter.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

RDK Documentation Portal | Documentation | WebUI - RDK Documentation Portal | Documentation

https://developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/components/webui/
generic

[ENG] Multiple vulnerabilities in RDK-B WebUI – KN White Hats

https://whitehats.pwr.edu.pl//blog/2026-08-19-multiple-vulnerabilities-in-rdkb/

Vendor Advisories for CVE-2026-19509(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 16× in last 7d / 72× 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 108 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 21:24 UTCGHSA enrichment
  3. 2026-10-03 16:54 UTCEG score recompute
  4. 2026-10-03 16:54 UTCGHSA enrichment
  5. 2026-10-02 09:32 UTCEG score recompute
  6. 2026-10-02 09:32 UTCGHSA enrichment
  7. 2026-10-01 19:49 UTCEPSS rescore
  8. 2026-10-01 09:05 UTCEG score recompute
  9. 2026-10-01 09:05 UTCGHSA enrichment
  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-30 08:40 UTCEG score recompute
  12. 2026-09-30 08:40 UTCGHSA enrichment
  13. 2026-09-29 15:20 UTCEPSS rescore
  14. 2026-09-29 06:57 UTCEG score recompute
  15. 2026-09-29 06:57 UTCGHSA enrichment
  16. 2026-09-28 13:51 UTCEPSS rescore
  17. 2026-09-28 06:32 UTCEG score recompute
  18. 2026-09-28 06:32 UTCGHSA enrichment
  19. 2026-09-27 13:47 UTCEPSS rescore
  20. 2026-09-27 06:07 UTCEG score recompute
  21. 2026-09-27 06:07 UTCGHSA enrichment
  22. 2026-09-26 15:58 UTCEPSS rescore
  23. 2026-09-25 11:49 UTCEG score recompute
  24. 2026-09-25 11:49 UTCGHSA enrichment
  25. 2026-09-24 10:50 UTCEG score recompute
Show 75 more
  1. 2026-09-24 10:50 UTCGHSA enrichment
  2. 2026-09-23 10:23 UTCEG score recompute
  3. 2026-09-23 10:23 UTCGHSA enrichment
  4. 2026-09-22 09:57 UTCEG score recompute
  5. 2026-09-22 09:57 UTCGHSA enrichment
  6. 2026-09-21 09:32 UTCEG score recompute
  7. 2026-09-21 09:32 UTCGHSA enrichment
  8. 2026-09-20 09:07 UTCEG score recompute
  9. 2026-09-20 09:07 UTCGHSA enrichment
  10. 2026-09-19 07:47 UTCEG score recompute
  11. 2026-09-19 07:47 UTCGHSA enrichment
  12. 2026-09-18 19:27 UTCEPSS rescore
  13. 2026-09-18 07:19 UTCEG score recompute
  14. 2026-09-18 07:19 UTCGHSA enrichment
  15. 2026-09-17 06:54 UTCEG score recompute
  16. 2026-09-17 06:54 UTCGHSA enrichment
  17. 2026-09-16 14:07 UTCEPSS rescore
  18. 2026-09-16 06:14 UTCEG score recompute
  19. 2026-09-16 06:14 UTCGHSA enrichment
  20. 2026-09-16 05:14 UTCEPSS rescore
  21. 2026-09-15 05:48 UTCEG score recompute
  22. 2026-09-15 05:48 UTCGHSA enrichment
  23. 2026-09-14 04:41 UTCEG score recompute
  24. 2026-09-14 04:41 UTCGHSA enrichment
  25. 2026-09-13 16:46 UTCEPSS rescore
  26. 2026-09-13 04:16 UTCEG score recompute
  27. 2026-09-13 04:16 UTCGHSA enrichment
  28. 2026-09-12 15:00 UTCEPSS rescore
  29. 2026-09-12 03:50 UTCEG score recompute
  30. 2026-09-12 03:50 UTCGHSA enrichment
  31. 2026-09-11 14:52 UTCEPSS rescore
  32. 2026-09-11 09:36 UTCEPSS rescore
  33. 2026-09-11 03:24 UTCEG score recompute
  34. 2026-09-11 03:24 UTCGHSA enrichment
  35. 2026-09-10 09:34 UTCEPSS rescore
  36. 2026-09-10 02:58 UTCGHSA enrichment
  37. 2026-09-09 02:32 UTCEG score recompute
  38. 2026-09-09 02:32 UTCGHSA enrichment
  39. 2026-09-08 22:00 UTCEPSS rescore
  40. 2026-09-07 20:08 UTCEG score recompute
  41. 2026-09-07 20:08 UTCGHSA enrichment
  42. 2026-09-07 16:01 UTCEPSS rescore
  43. 2026-09-06 19:42 UTCEG score recompute
  44. 2026-09-06 19:42 UTCGHSA enrichment
  45. 2026-09-06 13:47 UTCEPSS rescore
  46. 2026-09-05 19:16 UTCEG score recompute
  47. 2026-09-05 19:16 UTCGHSA enrichment
  48. 2026-09-04 18:51 UTCEG score recompute
  49. 2026-09-04 18:51 UTCGHSA enrichment
  50. 2026-09-04 05:06 UTCEPSS rescore
  51. 2026-09-03 18:05 UTCGHSA enrichment
  52. 2026-09-02 21:43 UTCEG score recompute
  53. 2026-09-02 21:43 UTCGHSA enrichment
  54. 2026-09-02 14:11 UTCEPSS rescore
  55. 2026-09-01 21:17 UTCEG score recompute
  56. 2026-09-01 21:17 UTCGHSA enrichment
  57. 2026-09-01 13:53 UTCEPSS rescore
  58. 2026-08-31 20:51 UTCGHSA enrichment
  59. 2026-08-30 20:21 UTCEG score recompute
  60. 2026-08-30 20:21 UTCGHSA enrichment
  61. 2026-08-30 19:17 UTCEPSS rescore
  62. 2026-08-30 01:22 UTCEPSS rescore
  63. 2026-08-29 19:56 UTCEG score recompute
  64. 2026-08-29 19:56 UTCGHSA enrichment
  65. 2026-08-28 21:41 UTCEPSS rescore
  66. 2026-08-28 19:31 UTCEG score recompute
  67. 2026-08-28 19:30 UTCGHSA enrichment
  68. 2026-08-27 17:23 UTCGHSA enrichment
  69. 2026-08-27 16:53 UTCEG score recompute▲ 6.50
  70. 2026-08-27 16:52 UTCGHSA enrichment
  71. 2026-08-27 16:43 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  72. 2026-08-27 14:25 UTCEPSS rescore
  73. 2026-08-26 14:46 UTCEPSS rescore
  74. 2026-08-25 23:11 UTCGHSA enrichment
  75. 2026-08-25 13:48 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-19509?
CVE-2026-19509 is a medium vulnerability published on August 19, 2026. Improper input validation in ajaxSetwirelessnetworkconfiguration.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows an authenticated attacker to cause denial of service via a crafted ssidnumber parameter.
When was CVE-2026-19509 disclosed?
CVE-2026-19509 was first published on August 19, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19509 actively exploited?
CVE-2026-19509 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19509?
CVE-2026-19509 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-19509?
No fix for CVE-2026-19509 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-19509 are linked in the Vendor Advisories panel on this page.

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