VULNERABILITY INTELLIGENCE

CVE-2022-45440

CVSS score4.4 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2023-01-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • CWE-59: Improper Link Resolution Before File Access ('Link Following')

Primary references