{"id":"CVE-2022-45440","published":"2023-01-17T00:00:00Z","modified":"2025-12-17T08:33:35Z","title":"A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes…","vendor":"Zyxel","product":"AX7501-B0 firmware","tier":"core","eol":null,"affectedVersions":[{"vendor":"Zyxel","product":"AX7501-B0 firmware","versions":["< V5.17(ABPC.3)C0"]}],"description":{"text":"A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes symbolic links on external storage media. A local authenticated attacker with administrator privileges could abuse this vulnerability to access the root file system by creating a symbolic link on external storage media, such as a USB flash drive, and then logging into the FTP server on a vulnerable device.","provenance":"source","from":"CVE.org"},"summary":null,"cvss":{"score":4.4,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00249,"percentile":0.16239,"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-59","name":"Improper Link Resolution Before File Access"}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-48311","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-48311","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2023-01-17","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2022-45440","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":null,"daysToKev":null},"priority":{"score":41.3,"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":3.25,"detail":"percentile 0.1624"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":3.08,"detail":"base score 4.4"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}