CVE-2020-18331

Directory traversal vulnerability in ChinaMobile PLC Wireless Router model GPN2.4P21-C-CN running...

9.1 Critical

Directory traversal vulnerability in ChinaMobile PLC Wireless Router model GPN2.4P21-C-CN running the firmware version W2000EN-01(hardware platform Gpn2.4P21-C_WIFI-V0.05), via the getpage parameter to /cgi-bin/webproc.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

1.32%Up 0.4 points since Jan 25, 2023

What each source reports

NVD Score used 9.1

Record: CVE-2020-18331
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

CVE List 9.1

Record: CVE-2020-18331
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

EUVDEUVD-2020-10255 9.1

Record: EUVD-2020-10255
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-w48q-2q3f-h2f8 9.1

Directory traversal vulnerability in ChinaMobile PLC Wireless Router model GPN2.4P21-C-CN running...

Record: GHSA-w48q-2q3f-h2f8
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-22
Updated: 2026-11-02

Affected products

chinamobileltd gpn2.4p21-c-cn firmware

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-18331 is a critical vulnerability (CVSS 9.1) in Chinamobileltd Gpn2.4p21-c-cn Firmware, published January 25, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.32%, the 71st percentile. No source names a fixed version.