CVE-2021-33964

Name: CVE-2021-33964
Creator: NVD / NIST
Published: 2022-01-18T12:15:08.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.87%

Last modified Jun 17, 2026

CVE-2021-33964 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. China Mobile An Lianbao WF-1 V1.0.1 router provides a web interface /api/ZRRuleFilter/set_firewall_level which receives parameters by POST request, and the parameter firewall_level has a command injection vulnerability. An attacker can use the vulnerability to execute remote commands.. EPSS estimates a 2.87% chance of exploitation in the next 30 days.

Description

China Mobile An Lianbao WF-1 V1.0.1 router provides a web interface /api/ZRRuleFilter/set_firewall_level which receives parameters by POST request, and the parameter firewall_level has a command injection vulnerability. An attacker can use the vulnerability to execute remote commands.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.87%

85.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Chinamobile	An Lianbao Wf-1 Firmware	1.0.1

References

http://iot.10086.cn/?l=en-usProduct, Vendor Advisory
https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/China%20Mobile%20An%20Lianbao%20WF-1%20router%20Command%20Injection11.mdBroken Link
https://www.cnvd.org.cn/flaw/show/CNVD-2021-03520Third Party Advisory, VDB Entry
https://www.ebuy7.com/item/china-mobile-wireless-router-qualcomm-qiki-wifi6-routing-mesh-network-home-5g-dual-frequency-double-gigabit-port-wall-wall-high-speed-%E2%80%8B%E2%80%8Bhigh-power-enhanced-dormitory-students-an-lianbao-wf-1-628692180620Broken Link
http://iot.10086.cn/?l=en-usProduct, Vendor Advisory
https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/China%20Mobile%20An%20Lianbao%20WF-1%20router%20Command%20Injection11.mdBroken Link
https://www.cnvd.org.cn/flaw/show/CNVD-2021-03520Third Party Advisory, VDB Entry
https://www.ebuy7.com/item/china-mobile-wireless-router-qualcomm-qiki-wifi6-routing-mesh-network-home-5g-dual-frequency-double-gigabit-port-wall-wall-high-speed-%E2%80%8B%E2%80%8Bhigh-power-enhanced-dormitory-students-an-lianbao-wf-1-628692180620Broken Link

Timeline

Published: Jan 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33964?

How severe is CVE-2021-33964?

CVE-2021-33964 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33964?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33964?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST