CVE-2026-19509

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 0

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

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
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 19, 2026

References (2)

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.

Data Freshness Timeline

(refreshed 4× in last 7d / 4× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-19 20:19 UTCNVD update
  3. 2026-08-19 19:33 UTCEG score recompute
  4. 2026-08-19 19:32 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-19509?
CVE-2026-19509 is a publicly disclosed 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 in the National Vulnerability Database on August 19, 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% probability of exploitation in the next 30 days, which ranks it in the top 94.1% of all scored CVEs.
How do I remediate CVE-2026-19509?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19509, 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

Explore the affected products and dependency analysis for CVE-2026-19509

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