EUVD-2026-62715
GHSA-qp83-xrr8-j73f
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Login endpoint is network-accessible with no authentication; only availability is impacted via unbounded password processing; no confidentiality or integrity impact applies.
Primary rating from Vendor (certcc).
CVSS VectorVendor: certcc
Lifecycle Timeline
4DescriptionCVE.org
Uncontrolled resource consumption in check.jst in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows a remote unauthenticated attacker to cause denial of service via excessively large password values.
AnalysisAI
Denial of service in RDK-B WebUI version rdkb-2025q4-kirkstone.04.10.26 is achievable by any remote unauthenticated attacker who submits an excessively large password value to the login handler, triggering uncontrolled resource consumption in the check.jst template. The flaw (CWE-400) requires no credentials, no user interaction, and no special configuration - any device with its WebUI reachable is vulnerable to availability loss. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions beyond network reachability of the WebUI login page are required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H scores 7.5 (High) and accurately reflects that the attack is trivially automatable from the network with no prerequisites - a worst-case availability scenario for the affected device. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch with an exact fix version has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all RDK-B devices in production and restrict WebUI access via firewall to trusted administrative networks only. …
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More in Rdk B Webui
View allRemote unauthenticated memory corruption in RDK-B WebUI (build rdkb-2025q4-kirkstone.04.10.26) arises from a heap-based
Authentication bypass in the RDK-B WebUI (broadband gateway management interface), build rdkb-2025q4-kirkstone.04.10.26,
Race condition in the authentication handler (`check.jst`) of RDK-B WebUI rdkb-2025q4-kirkstone allows remote unauthenti
Denial of service in RDK-B WebUI rdkb-2025q4-kirkstone.04.10.26 allows an authenticated remote attacker to crash the web
Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
View allShare
External POC / Exploit Code
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