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CVE-2022-45440

Quick assessment

Affected
Zyxel AX7501-B0 firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel AX7501-B0是中国合勤（Zyxel）公司的一个路由器。 Zyxel AX7501-B0 V5.17(ABPC.3)C0之前版本存在安全漏洞。攻击者利用该漏洞通过在外部存储介质（如USB闪存驱动器）上创建符号链接，然后登录到易受攻击设备上的FTP服务器，从而访问根文件系统。

CVSS 4.4 · Medium EPSS 0.25% · P17

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2022-45440

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel AX7501-B0 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel AX7501-B0是中国合勤（Zyxel）公司的一个路由器。 Zyxel AX7501-B0 V5.17(ABPC.3)C0之前版本存在安全漏洞。攻击者利用该漏洞通过在外部存储介质（如USB闪存驱动器）上创建符号链接，然后登录到易受攻击设备上的FTP服务器，从而访问根文件系统。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel AX7501-B0 firmware < V5.17(ABPC.3)C0 -

II. Public POCs for CVE-2022-45440

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III. Intelligence Information for CVE-2022-45440

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Other References for CVE-2022-45440 (1)

IV. Related Vulnerabilities

Same product: AX7501-B0 firmware
Same vendor: Zyxel
Same weakness: CWE-59

V. Comments for CVE-2022-45440

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