CVE-2026-77217

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The web_radiusSrv*_post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into fixed-size stack buffers without length validation, and additionally dereferences radName and radIp without verifying their presence in the request. A remote authenticated attacker can send crafted requests to crash the CGI process or web management service, resulting in denial of service.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.planet.com.tw/en/support/security-advisory/10
https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-and-null-pointer-dereference-via-dispatcher-cgi-radius-handlers

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 20:19

Updated : 2026-09-08 20:20

NVD link : CVE-2026-77217

Mitre link : CVE-2026-77217

CVE.ORG link : CVE-2026-77217

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

CWE-476

NULL Pointer Dereference

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