CVE-2026-75126— PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Standard 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 在 /cgi-bin/dispatcher.cgi 中存在多个经身份验证的栈缓冲区溢出漏洞。以下处理函数在将攻击者可控的 POST 参数复制到固定大小的栈缓冲区时，未进行长度校验： web_vlan_membership_edit_dialog_post web_dai_vlan_post web_poe_alive_rmtip_post web_sys_sntp_post web_tool_upgradeManager_post w
Possible ATT&CK Techniques 3 AI
T1190 · Exploit Public-Facing Application T1195 · Supply Chain Compromise T1490 · Inhibit System RecoveryAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| PLANET Technology Corp. | PLANET GS-4210-16P2S | < 3.441b260626 |
affected |
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I. Basic Information for CVE-2026-75126
Vulnerability Information
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Vulnerability Title
PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Standard Handlers
Source: CVE Program / CVE List V5
Vulnerability Description
PLANET GS-4210-16P2S firmware before 3.441b260626 contains multiple authenticated stack buffer overflow vulnerabilities in /cgi-bin/dispatcher.cgi. The following handlers copy attacker-controlled POST parameters into fixed-size stack buffers without length validation: web_vlan_membership_edit_dialog_post; web_dai_vlan_post; web_poe_alive_rmtip_post; web_sys_sntp_post; web_tool_upgradeManager_post; web_port_countersClr_post; web_rmon_statisticsClr_post; web_cablediag_copper_post; web_aaa_*Authlist* handlers; web_acl_mgmt_Rules_Apply_post; web_acl_mgmt_Rules_Edit_post; web_acl_*AceDel_post handlers; web_acl_*AceAdd/Edit_post handlers; web_acl_bindAdd_post; web_acl_bindEdit_post; web_snmp_v3view_add_post; web_snmp_v3group_add_post; web_snmp_v3community_add_post; web_snmp_v3host_add_post; web_snmp_notifyv3_add_post; web_snmp_v3user_add_post; web_snmpv3_remote_engineId_add_post; web_stp_globalSetting_post; web_isg_db_post; web_tacplus*_post handlers; web_dhcp_option82_post; and web_dhcp_port_option82_cid_post. A remote authenticated attacker can send crafted requests 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-2026-75126
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-75126 (2)
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-
🔗 PLANET GS-4210-16P2S V3 - Security Advisory - PLANET Technology Read full article vendor-advisory patch
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-2026-75125 | 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
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V. Comments for CVE-2026-75126
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