CVE-2023-4474
CVSS v3
9.8
CRITICAL
EPSS Score
29.7 %
exploit probability, as of 2026-10-04
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2023-11-30
Frequently asked questions
What is CVE-2023-4474?
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.
Is CVE-2023-4474 actively exploited?
Active exploitation of CVE-2023-4474 has not been confirmed. Its EPSS score was 29.7% on 2026-10-04, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-4474?
CVE-2023-4474 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2023-4474 affecting your environment?
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