How severe is CVE-2020-18331?

CVE-2020-18331 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-18331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18331?

CVE-2020-18331 affects Chinamobileltd Gpn2.4p21-c-cn Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18331?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-18331 published?

CVE-2020-18331 was published on 2023-01-26 and last updated on 2026-06-17.

CVE-2020-18331

CVE-2020-18331 is a critical-severity vulnerability in Chinamobileltd Gpn2.4p21-c-cn Firmware with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Chinamobileltd Gpn2.4p21-c-cn Firmware
Published: 2023-01-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-18331?: 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.
How severe is CVE-2020-18331?: CVE-2020-18331 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-18331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18331?: CVE-2020-18331 affects Chinamobileltd Gpn2.4p21-c-cn Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-18331 published?: CVE-2020-18331 was published on 2023-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:chinamobileltd:gpn2.4p21-c-cn_firmware:w2000en-01:*:*:*:*:*:*:*

More vulnerabilities in Chinamobileltd Gpn2.4p21-c-cn Firmware

CVE-2020-18330 — Critical (CVSS 9.1): An issue was discovered in the default configuration of ChinaMobile PLC Wireless Router model GPN2.4P21-C-CN running…
CVE-2019-6282 — High (CVSS 8.8): ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 have CSRF via the…
CVE-2019-6279 — High (CVSS 8.8): ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 have an Incorrect Access Control…
CVE-2019-1010136 — High (CVSS 7.5): ChinaMobile GPN2.4P21-C-CN W2001EN-00 is affected by: Incorrect Access Control - Unauthenticated Remote Reboot. The…

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