EUVD-2026-67788
GHSA-qx7g-cv57-953h
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible web interface but PR:H required; impact is availability-only against the management process with no scope change to other systems.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
PLANET GS-4210-16P2S 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.
AnalysisAI
Stack-based buffer overflow vulnerabilities in the PLANET GS-4210-16P2S managed PoE switch web management interface allow a remote authenticated attacker to crash the CGI process and disrupt web-based device administration. Three separate POST parameter handlers in /cgi-bin/dispatcher.cgi - processing usrPass, enbPass, usrName, and usrPass - copy user-supplied input into fixed-size stack buffers without bounds validation, triggering CWE-121 conditions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Authentication to the switch's web management interface is required prior to exploitation - the CVSS 4.0 vector specifies PR:H (High Privileges Required), confirming that valid administrative credentials must be held by the attacker before any of the three overflow conditions can be triggered. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (Medium) accurately reflects the constrained threat model: Network attack vector and Low complexity are offset by the High privilege requirement (PR:H), meaning an attacker must already hold valid administrative credentials before triggering any of the three overflow conditions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade the PLANET GS-4210-16P2S firmware to version 3.441b260626 or later, as specified in the vendor security advisory at https://www.planet.com.tw/en/support/security-advisory/10. … Detailed patch versions, workarounds, and compensating controls in full report. |
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More in Planet Gs 4210 16P2S
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Authenticated OS command injection in PLANET GS-4210-16P2S managed switch firmware prior to 3.441b260626 enables a remot
OS command injection in the PLANET GS-4210-16P2S managed PoE switch firmware before 3.441b260626 allows an authenticated
Stack-based buffer overflow and null pointer dereference vulnerabilities in the PLANET GS-4210-16P2S managed PoE switch
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Null pointer dereference in PLANET GS-4210-16P2S managed switch firmware before 3.441b260626 allows remote authenticated
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Denial Of Service
View allShare
External POC / Exploit Code
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