Uncontrolled Resource Consumption Vulnerability in Zyxel DX3301-T0 Firmware
CVE-2025-6599

5.3MEDIUM

Key Information:

Vendor

Zyxel
Status
Dx3301-t0 Firmware
Vendor
CVE Published:
18 November 2025

What is CVE-2025-6599?

An uncontrolled resource consumption vulnerability found in the web server of Zyxel DX3301-T0 firmware versions 5.50(ABVY.6.3)C0 and earlier allows attackers to execute Slowloris-style denial-of-service (DoS) attacks. These attacks can disrupt legitimate HTTP requests and impair access to the web management interface temporarily, while maintaining the functionality of other networking services.

Affected Version(s)

DX3301-T0 firmware <= 5.50(ABVY.6.3)C0

References

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

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-6599 : Uncontrolled Resource Consumption Vulnerability in Zyxel DX3301-T0 Firmware