Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://www.planet.com.tw/en/support/security-advisory/10
- https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-
FAQ
What is CVE-2026-77218?
CVE-2026-77218 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 p...
How severe is CVE-2026-77218?
CVE-2026-77218 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-77218?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.