CVE-2023-22913

HIGHCVSS 8.1/10EPSS 1.29%

Last modified

CVE-2023-22913 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 1.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
1.29%

66.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ZyxelUsg Flex 100 Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 100w Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 200 Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 50 Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 50w Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 500 Firmware>= 4.50, <= 5.35
ZyxelUsg Flex 700 Firmware>= 4.50, <= 5.35
ZyxelVpn100 Firmware>= 4.50, <= 5.35
ZyxelVpn1000 Firmware>= 4.50, <= 5.35
ZyxelVpn300 Firmware>= 4.50, <= 5.35
ZyxelVpn50 Firmware>= 4.50, <= 5.35

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2023-22913?
CVE-2023-22913 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.
How do I fix CVE-2023-22913?
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-2023-22913?

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

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Source: NVD / NIST