HOMEVULNERABILITIESCVE-2021-33964
HIGH

CVE-2021-33964

CWE-77Published: January 18, 2022· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-33964 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

chinamobile2 product(s)
an lianbao wf-1 firmwarean lianbao wf-1
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://iot.10086.cn/?l=en-us
ADVISORYhttps://www.cnvd.org.cn/flaw/show/CNVD-2021-03520
ADVISORYhttp://iot.10086.cn/?l=en-us
ADVISORYhttps://www.cnvd.org.cn/flaw/show/CNVD-2021-03520

All References (8)

→
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

Quick Facts

CVE IDCVE-2021-33964
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedJan 18, 2022

Related CVEs (CWE-77)

CVE-2015-1986
10.0
CVE-2018-16462
10.0
CVE-2015-1938
10.0
CVE-2015-1949
10.0
CVE-2017-7876
10.0
CVE-2024-32766
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-33964 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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