PLANET GS-4210-16P2S V3 Stack Buffer Overflow via dispatcher.cgi Credential Handlers (CVE-2026-77218) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-77218

PLANET GS-4210-16P2S V3 Stack Buffer Overflow via dispatcher.cgi Credential Handlers

Answer in brief

CVE-2026-77218 records a Unknown severity vulnerability in PLANET GS-4210-16P2S V3 Stack Buffer Overflow via dispatcher.cgi Credential Handlers. The current sources do not mark it as known exploited. The current feed maps PLANET Technology Corp./PLANET GS-4210-16P2S (generic), PLANET Technology Corp./PLANET GS-4210-16P2S V3 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Sep 1, 2026Source checked Sep 1, 2026First seen by HOL Aug 28, 2026Material review Sep 1, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps PLANET Technology Corp./PLANET GS-4210-16P2S (generic), PLANET Technology Corp./PLANET GS-4210-16P2S V3 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
PLANET Technology Corp./PLANET GS-4210-16P2Sgeneric	>=0 <3.441b260626	3.441b260626
PLANET Technology Corp./PLANET GS-4210-16P2S V3generic	>=0 <3.441b260626	3.441b260626

Recommended response

Check inventory. Check lockfiles and deployed manifests for PLANET Technology Corp./PLANET GS-4210-16P2S, PLANET Technology Corp./PLANET GS-4210-16P2S V3.
Review the reported fix. Update PLANET Technology Corp./PLANET GS-4210-16P2S to 3.441b260626; PLANET Technology Corp./PLANET GS-4210-16P2S V3 to 3.441b260626 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source description

PLANET GS-4210-16P2S V3 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.

Quoted source text, attributed separately from HOL analysis.