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

Quick assessment

Affected
PLANET Technology Corp. PLANET GS-4210-16P2S
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PLANET GS-4210-16P2S 固件版本低于 3.441b260626 的 Web 管理界面中存在一个预认证内存损坏漏洞。具体而言， 函数在复制过长的 HTTP 查询字符串时，未确保以 NUL 字符结尾，导致 函数将攻击者控制的数据处理到一个固定大小的栈缓冲区中。未经身份验证的远程攻击者可以通过向 发送一个过长的 GET 请求，从而造成 Web 管理界面的拒绝服务（DoS），并可能触发内存损坏。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
PLANET Technology Corp. PLANET GS-4210-16P2S < 3.441b260626 affected
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I. Basic Information for CVE-2026-75124

Vulnerability Information
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Vulnerability Title
PLANET GS-4210-16P2S Memory Corruption via dispatcher.cgi _readHttpParam
Source: CVE Program / CVE List V5
Vulnerability Description
PLANET GS-4210-16P2S 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
PLANET Technology Corp. PLANET GS-4210-16P2S 0 ~ 3.441b260626 -

II. Public POCs for CVE-2026-75124

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III. Intelligence Information for CVE-2026-75124

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Vendor Advisories for CVE-2026-75124 (2)

Same Patch Batch · PLANET Technology Corp. · 2026-08-28 · 8 CVEs total

CVE-2026-75121 7.2 HIGH PLANET GS-4210-16P2S Command Injection via dispatcher.cgi web_vlan_membership_edit_dialog_
CVE-2026-75122 7.2 HIGH PLANET GS-4210-16P2S Command Injection via httpuploadcert.cgi
CVE-2026-75123 7.2 HIGH PLANET GS-4210-16P2S Command Injection via dispatcher.cgi web_smtp_test_post
CVE-2026-75126 4.9 MEDIUM PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Standard Handlers
CVE-2026-75125 4.9 MEDIUM PLANET GS-4210-16P2S Null Pointer Dereference DoS via dispatcher.cgi web_poe_alive_rmtip_p
CVE-2026-77217 4.9 MEDIUM PLANET GS-4210-16P2S Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.cgi
CVE-2026-77218 4.9 MEDIUM PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Credential Handlers

IV. Related Vulnerabilities

Same product: PLANET GS-4210-16P2S
Same vendor: PLANET Technology Corp.
Same weakness: CWE-120

V. Comments for CVE-2026-75124

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