CVE-2023-4474

Description

The improper neutralization of special elements in the WSGI server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 11.89% Top 10%
Vendor Advisory zyxel.com
Affected: Zyxel NAS326 firmware
Affected: Zyxel NAS542 firmware
Published at:
Updated at:

References

Link Tags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products patch vendor advisory
https://bugprove.com/knowledge-hub/cve-2023-4473-and-cve-2023-4474-authentication-bypass-and-multiple-blind-os-command-injection-vulnerabilities-in-zyxel-s-nas-326-devices/

Frequently Asked Questions

What is the severity of CVE-2023-4474?
CVE-2023-4474 has been scored as a critical severity vulnerability.
How to fix CVE-2023-4474?
To fix CVE-2023-4474, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-4474 being actively exploited in the wild?
It is possible that CVE-2023-4474 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~12% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-4474?
CVE-2023-4474 affects Zyxel NAS326 firmware, Zyxel NAS542 firmware.
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