Critical severity · published Mar 1, 2022
CVE-2021-4039
A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device
9.8
CVSS
71%
EPSS
No
On KEV
Description
A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)71.0% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
Nwa1100-nh Firmware · Zyxel
before 2.12\(aasi.3\)c0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4039
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4039
Exploit
http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html
Patch
https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml
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