CVE-2026-75124Network attack vector

Pre-authentication service disruption via unterminated query string

Published Aug 28, 2026 · Updated Aug 28, 2026

Memory corruption in PLANET GS-4210-16P2S firmware before 3.441b260626 allows remote attackers to interrupt web management. The _readHttpParam function copies an oversized HTTP query string without guaranteed NUL termination before parse_query_string processes it in a fixed-size stack buffer. No authentication is required; a crafted GET request to /cgi-bin/dispatcher.cgi can disrupt the web-management interface.

CVSS severity8.7
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in PLANET GS-4210-16P2S firmware before 3.441b260626 allows remote attackers to interrupt web management. The _readHttpParam function copies an oversized HTTP query string without guaranteed NUL termination before parse_query_string processes it in a fixed-size stack buffer. No authentication is required; a crafted GET request to /cgi-bin/dispatcher.cgi can disrupt the web-management interface.

The record

CVE
CVE-2026-75124
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
PLANET Technology Corporation
Product
PLANET GS-4210-16P2S
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.441b260626

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PLANET Technology Corporation · PLANET GS-4210-16P2Sversion=0 <3.441b260626

Published CVSS scores

8.7PLANET Technology CorporationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5PLANET Technology CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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