CVE-2023-35138

Description

A command injection vulnerability in the “show_zysync_server_contents” function 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 HTTP POST request.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 8.31% 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

Frequently Asked Questions

What is the severity of CVE-2023-35138?
CVE-2023-35138 has been scored as a critical severity vulnerability.
How to fix CVE-2023-35138?
To fix CVE-2023-35138, 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-2023-35138 being actively exploited in the wild?
It is possible that CVE-2023-35138 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-35138?
CVE-2023-35138 affects Zyxel NAS326 firmware, Zyxel NAS542 firmware.
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