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High severity · published Apr 24, 2023
CVE-2023-22913
A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series…
8.1
CVSS
1.3%
EPSS
No
On KEV
Description
A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UF
Usg Flex 100 Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 100w Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 200 Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 50 Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 500 Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 50w Firmware · Zyxel
4.50 through 5.35 · source: NVD
UF
Usg Flex 700 Firmware · Zyxel
4.50 through 5.35 · source: NVD
VF
Vpn100 Firmware · Zyxel
4.50 through 5.35 · source: NVD
VF
Vpn1000 Firmware · Zyxel
4.50 through 5.35 · source: NVD
VF
Vpn300 Firmware · Zyxel
4.50 through 5.35 · source: NVD
VF
Vpn50 Firmware · Zyxel
4.50 through 5.35 · source: NVD
Affected product
UF
Usg Flex 100 Firmware
Zyxel
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-22913
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-22913
Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
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