Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck

CVE-2026-75124PLANET GS-4210-16P2S V3 Memory Corruption via dispatcher.cgi _readHttpParam

High 7.5

In plain English

A high-severity buffer overflow in PLANET GS-4210-16P2S V3 from PLANET Technology Corp.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.7%top 46.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
PLANET Technology Corp.	PLANET GS-4210-16P2S V3	0 – before 3.441b260626

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Vendor Advisory vendor-advisory, patch
https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-memory-corruption-via-dispatcher-cgi-readhttpparam third-party-advisory