CVE-2026-75124

High

Description

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains a pre-authentication memory corruption vulnerability in the web management interface where the _readHttpParam function copies an oversized HTTP query string without guaranteeing NUL termination, allowing parse_query_string to process attacker-controlled data into a fixed-size stack buffer. An unauthenticated remote attacker can send an oversized GET request to dispatcher.cgi to cause denial of service of the web management interface and potentially trigger memory corruption.

SeverityHigh

CVSS7.5

Exploit probability—

ProductPLANET GS-4210-16P2S V3

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-120CWE-120

How to fix

Update

PLANET Technology Corp. PLANET GS-4210-16P2S V33.441b260626 or later

Patches

planet.com.tw/en/support/security-advisory/10

Affected products

Product	Affected versions	Fixed in
PLANET Technology Corp. PLANET GS-4210-16P2S V3	v < 3.441b260626	3.441b260626

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