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CVE-2026-75123— PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_smtp_test_post

Quick assessment

Affected
PLANET Technology Corp. PLANET GS-4210-16P2S V3
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是中国Planet公司的一款网管型以太网交换机。 PLANET GS-4210-16P2S 3.441b260626之前版本存在命令注入漏洞，该漏洞源于web_smtp_test_post处理程序将调用者提供的SMTP服务器值直接拼接到shell命令且未进行清理，具有管理员Web凭据的远程攻击者可发送特制SMTP服务器值，在设备上执行任意操作系统命令。

CVSS 7.2 · High EPSS 1.46% · P74

Possible ATT&CK Techniques 1 AI

T1059.004 · Unix Shell

Affected Version Matrix 1

VendorProduct Version RangeStatus
PLANET Technology Corp. PLANET GS-4210-16P2S V3 < 3.441b260626 affected
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I. Basic Information for CVE-2026-75123

Vulnerability Information
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Vulnerability Title
PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_smtp_test_post
Source: CVE Program / CVE List V5
Vulnerability Description
PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated OS command injection vulnerability in /cgi-bin/dispatcher.cgi. The web_smtp_test_post handler incorporates a caller-supplied SMTP server value directly into a shell command without sanitization. A remote attacker with administrator web credentials can send a crafted SMTP server value to execute arbitrary operating-system commands on the device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
PLANET GS-4210-16P2S 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PLANET GS-4210-16P2S是中国Planet公司的一款网管型以太网交换机。 PLANET GS-4210-16P2S 3.441b260626之前版本存在命令注入漏洞，该漏洞源于web_smtp_test_post处理程序将调用者提供的SMTP服务器值直接拼接到shell命令且未进行清理，具有管理员Web凭据的远程攻击者可发送特制SMTP服务器值，在设备上执行任意操作系统命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PLANET Technology Corp. PLANET GS-4210-16P2S V3 0 ~ 3.441b260626 -

II. Public POCs for CVE-2026-75123

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III. Intelligence Information for CVE-2026-75123

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Vendor Advisories for CVE-2026-75123 (2)

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

CVE-2026-75124 7.5 HIGH PLANET GS-4210-16P2S V3 Memory Corruption via dispatcher.cgi _readHttpParam
CVE-2026-75121 7.2 HIGH PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_vlan_membership_edit_dial
CVE-2026-75122 7.2 HIGH PLANET GS-4210-16P2S V3 Command Injection via httpuploadcert.cgi
CVE-2026-75126 4.9 MEDIUM PLANET GS-4210-16P2S V3 Stack Buffer Overflow via dispatcher.cgi Standard Handlers
CVE-2026-75125 4.9 MEDIUM PLANET GS-4210-16P2S V3 Null Pointer Dereference DoS via dispatcher.cgi web_poe_alive_rmti
CVE-2026-77217 4.9 MEDIUM PLANET GS-4210-16P2S V3 Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.
CVE-2026-77218 4.9 MEDIUM PLANET GS-4210-16P2S V3 Stack Buffer Overflow via dispatcher.cgi Credential Handlers

IV. Related Vulnerabilities

Same product: PLANET GS-4210-16P2S V3
Same vendor: PLANET Technology Corp.
Same weakness: CWE-78