RDK WebUI heap-based buffer overflow vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-19508
StatePUBLISHED
Assignercertcc
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 20:17:14 UTC
Updated2026-09-03 17:42:23 UTC
DescriptionHeap-based buffer overflow in the multipart form-data parser in `jst_post.c` in RDK-B WebUI `rdkb-2025q4-kirkstone.04.10.26` allows a remote unauthenticated attacker to cause memory corruption and denial of service, and potentially execute arbitrary code, via a crafted multipart/form-data request.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.008100000 probability, percentile 0.545630000 (date 2026-09-07)

Problem Types: CWE-119 | CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer | CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA RDK RDK-B WebUI affected rdkb-2025q4-kirkstone Not specified

References

ReferenceSourceLinkTags
whitehats.pwr.edu.pl/blog/2026-08-19-multiple-vulnerabilities-in-rdkb [email protected] whitehats.pwr.edu.pl
developer.rdkcentral.com/documentation/documentation/rdk_broadband_documentation/compo... [email protected] developer.rdkcentral.com
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