Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-77218— PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Credential Handlers

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 /cgi-bin/dispatcher.cgi 存在认证后栈缓冲区溢出漏洞。 具体而言： web_login_first_post 处理器在将 POST 参数 usrPass 复制到固定大小的栈缓冲区时，未进行长度校验； web_sys_enablePasswd_post 处理器在将 POST 参数 enbPass 复制到固定大小的栈缓冲区时，未进行长度校验； web_sys_localUser_post 处理器在将 POST 参

CVSS 4.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
PLANET Technology Corp. PLANET GS-4210-16P2S < 3.441b260626 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-77218

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Credential Handlers
Source: CVE Program / CVE List V5
Vulnerability Description
PLANET GS-4210-16P2S firmware before 3.441b260626 contains authenticated stack buffer overflow vulnerabilities in /cgi-bin/dispatcher.cgi. The web_login_first_post handler copies the usrPass POST parameter into a fixed-size stack buffer without length validation, the web_sys_enablePasswd_post handler copies the enbPass POST parameter into a fixed-size stack buffer without length validation, and the web_sys_localUser_post handler copies the usrName and usrPass POST parameters into fixed-size stack buffers without length validation. A remote authenticated attacker can send a crafted request to crash the CGI process or web management service, resulting in denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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-2026-77218

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-77218

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-77218 (2)

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

CVE-2026-75124 7.5 HIGH PLANET GS-4210-16P2S Memory Corruption via dispatcher.cgi _readHttpParam
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

IV. Related Vulnerabilities

Same product: PLANET GS-4210-16P2S
Same vendor: PLANET Technology Corp.
Same weakness: CWE-121

V. Comments for CVE-2026-77218

No comments yet

Leave a comment