CVE-2022-45440 - CVE House
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Status published Medium CVE-2022-45440

A vulnerability exists in the FTP server of the Zyxel...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

AX7501-B0 firmware
Vulnerable Versions:
< V5.17(ABPC.3)C0

Timeline

Official Publish: January 17th, 2023
Last Modified: December 17th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-59

MITRE ATT&CK TTPs

T1574 Hijack Execution Flow
Privilege Escalation
T1222 File and Directory Permissions Modification
Defense Evasion
T1005 Data from Local System
Collection
T1565 Data Manipulation
Impact
T1078 Valid Accounts
Persistence