CVE-2022-45440

MEDIUM EXPLOITED

Zyxel AX7501-B0 Firmware < 5.17(ABPC.3)C0 - Authenticated Directory Traversal via FTP Symbolic Link Processing

Title source: llm

Exploitation Summary

CVE-2022-45440 has been observed exploited in the wild (reported by VulnCheck KEV).

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.

References (1)

Core 1

Core References

Vendor Advisory

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

Scores

CVSS v3 4.4

EPSS 0.0014

EPSS Percentile 33.4%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

VulnCheck KEV 2024-11-01

CWE

CWE-59

Status published

Products (1)

zyxel/ax7501-b0_firmware < 5.17\(abpc.3\)c0

Published Jan 17, 2023

Tracked Since Feb 18, 2026