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TI-2026-53916 Aliases CVE-2026-77217GHSA-m873-gx73-4mvm

PLANET GS-4210-16P2S V3 Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.cgi RADIUS Handlers

Priority LOW 31CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The web_radiusSrv*_post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into fixed-size stack buffers without length validation, and additionally dereferences radName and radIp without verifying their presence in the request. A remote authenticated attacker can send crafted requests to crash the CGI process or web management service, resulting in denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00602 49th percentileScored 2026-11-07
Fix Fixed PLANET GS-4210-16P2S V3 (PLANET Technology Corp.): 3.441b260626

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PLANET Technology Corp.PLANET GS-4210-16P2S V3before 3.441b2606263.441b260626Patch availableCNA
  • PLANET GS-4210-16P2S V3 VendorPLANET Technology Corp. Affected before 3.441b260626 Fixed in 3.441b260626 Patch available CNA

Remediation

  • Fix · CNA PLANET GS-4210-16P2S V3 (PLANET Technology Corp.) Fixed in 3.441b260626

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    PLANET GS-4210-16P2S V3 — planet.com.tw/en/support/security-advisory/10

    8 records Highest priority Priority MEDIUM 4 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-52782 PLANET GS-4210-16P2S V3 Memory Corruption via dispatcher.cgi _readHttpParamPriority MEDIUM 45
    • TI-2026-52781 PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_smtp_test_postPriority MEDIUM 42
    • TI-2026-52779 PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_vlan_membership_edit_dialog_postPriority MEDIUM 42
    Show all 8 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77217
  2. 2026-10-03 Alias added: GHSA-m873-gx73-4mvm

References

Patch 1

  • TI-2024-34993 Planet Technology Planet WGS-804HPT Command Injection CVSS 4.0CRITICAL 9.3
  • TI-2025-29023 Planet Technology Network Products OS Command Injection CVSS 4.0CRITICAL 9.3
  • TI-2025-09152 Planet Technology｜Industrial Cellular Gateway - OS Command Injection CVSS 4.0CRITICAL 9.3
  • TI-2025-29024 Planet Technology Network Products OS Command Injection CVSS 4.0CRITICAL 9.3
  • TI-2024-32571 Planet Technology Planet WGS-804HPT Stack-based Buffer Overflow CVSS 4.0CRITICAL 9.3
  • TI-2024-07838 PLANET Technology switch devices - Missing Authentication for multiple HTTP routes CVSS 3.1CRITICAL 9.8
See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences