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CVE-2026-77217 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.9 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.planet.com.tw/en/support/security-advisory/10	[email protected]
https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-and-null-pointer-dereference-via-dispatcher-cgi-radius-handlers	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-121	Stack-based Buffer Overflow	[email protected]
CWE-476	NULL Pointer Dereference	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 1, 2026	CVE Modified	[email protected]
Aug 31, 2026	CVE Modified	CISA-ADP
Aug 28, 2026	New CVE Received	[email protected]