Command Injection Vulnerability in Zyxel NAS Products
CVE-2023-35138

9.8CRITICAL

Key Information:

Vendor

Zyxel
Status
NAS326 firmware
NAS542 firmware
Vendor
CVE Published:
30 November 2023

What is CVE-2023-35138?

A command injection vulnerability exists in the Zyxel NAS326 and NAS542 firmware that may allow unauthorized users to execute arbitrary operating system commands. This weakness is realized through the 'show_zysync_server_contents' function, which becomes exploitable if manipulated via a specially crafted HTTP POST request. Attackers could leverage this flaw to gain control over system operations, posing significant risks to data integrity and confidentiality.

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Affected Version(s)

NAS326 firmware V5.21(AAZF.14)C0

NAS542 firmware V5.21(ABAG.11)C0

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

EPSS Score

10% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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