{"id":"CVE-2023-28769","published":"2023-04-27T00:00:00Z","modified":"2025-01-31T18:43:25Z","title":"The buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware…","vendor":"Zyxel","product":"DX5401-B0 firmware","tier":"core","eol":null,"affectedVersions":[{"vendor":"Zyxel","product":"DX5401-B0 firmware","versions":["< V5.17(ABYO.1)C0"]}],"description":{"text":"The buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.","provenance":"source","from":"CVE.org"},"summary":null,"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0542,"percentile":0.92682,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2024-11-01","exploitedFirstSeen":"2024-11-01","ransomware":false,"evidence":[{"url":"https://levelblue.com/blogs/labs-research/ngioweb-remains-active-7-years-later","date":"2024-11-01"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":0,"pulses":[],"provenance":"machine"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-32404","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-32404","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"metasploit":[{"name":"Zyxel Unauthenticated LAN Remote Code Execution","module":"exploit/linux/misc/zyxel_multiple_devices_zhttp_lan_rce","type":"exploit","disclosureDate":"2022-02-01","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/misc/zyxel_multiple_devices_zhttp_lan_rce.rb"}],"first":{"date":"2022-02-01","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/misc/zyxel_multiple_devices_zhttp_lan_rce.rb"},"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2022-02-01","kind":"exploit-public","label":"First public exploit: Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/misc/zyxel_multiple_devices_zhttp_lan_rce.rb","provenance":"source"},{"date":"2023-04-27","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2023-28769","provenance":"source"},{"date":"2024-11-01","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://levelblue.com/blogs/labs-research/ngioweb-remains-active-7-years-later","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":null},"priority":{"score":65.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 727 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":18.54,"detail":"percentile 0.9268"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 Metasploit module"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}