{"id":"CVE-2026-77217","title":"PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi","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, radK…","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121","CWE-476"],"published":"2026-08-28","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:20:22.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77217","references":[{"url":"https://www.planet.com.tw/en/support/security-advisory/10","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-and-null-pointer-dereference-via-dispatcher-cgi-radius-handlers","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00433,"epssPercentile":0.36958,"ingestedAt":"2026-09-08T21:11:12.287Z","slug":"CVE-2026-77217","body":"## Overview\n\nPLANET 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}