Post-Authentication Command Injection Vulnerability in Zyxel DX3300-T0 Firmware
CVE-2025-8693

8.8HIGH

Key Information:

Vendor

Zyxel
Status
Dx3300-t0 Firmware
Vendor
CVE Published:
18 November 2025

What is CVE-2025-8693?

A command injection vulnerability exists within the 'priv' parameter of the Zyxel DX3300-T0 firmware, enabling an authenticated attacker to execute arbitrary operating system commands. This issue arises when the firmware processes input data from legitimate authenticated users without sufficient validation, allowing exploitation if proper security measures are not in place. As a result, attackers can potentially gain unauthorized control over the affected device's operating environment.

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Affected Version(s)

DX3300-T0 firmware <= 5.50(ABVY.6.3)C0

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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