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Critical severity · published May 12, 2022
CVE-2022-30525
Zyxel Multiple Firewalls OS Command Injection Vulnerability
In wildKEV
9.8
CVSS
99.9%
EPSS
Yes
On KEV
Description
A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable 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)99.9% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed May 16, 2022
Federal remediation dueJun 6, 2022
Ransomware campaign useNot known
Affected products
Which versions
AS
ATP series firmware · Zyxel
5.10 through 5.21 Patch 1 · source: vendor
U2
USG 20(W)-VPN firmware · Zyxel
5.10 through 5.21 Patch 1 · source: vendor
UF
USG FLEX 100(W) firmware · Zyxel
5.00 through 5.21 Patch 1 · source: vendor
UF
USG FLEX 200 firmware · Zyxel
5.00 through 5.21 Patch 1 · source: vendor, NVD
UF
USG FLEX 50(W) firmware · Zyxel
5.10 through 5.21 Patch 1 · source: vendor
UF
USG FLEX 500 firmware · Zyxel
5.00 through 5.21 Patch 1 · source: vendor, NVD
UF
USG FLEX 700 firmware · Zyxel
5.00 through 5.21 Patch 1 · source: vendor, NVD
VS
VPN series firmware · Zyxel
4.60 through 5.21 Patch 1 · source: vendor
AF
Atp100 Firmware · Zyxel
5.10 before 5.30 · source: NVD
AF
Atp100w Firmware · Zyxel
5.10 before 5.30 · source: NVD
AF
Atp200 Firmware · Zyxel
5.10 before 5.30 · source: NVD
AF
Atp500 Firmware · Zyxel
5.10 before 5.30 · source: NVD
Affected product
AS
ATP series firmware
Zyxel
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-30525
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-30525
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_CONFIRM
https://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml
x_refsource_MISC
http://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html
x_refsource_MISC
http://packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.html
x_refsource_MISC
http://packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.html
x_refsource_MISC
http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html
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