Unrated severityNVD Advisory· Published Nov 18, 2025· Updated Nov 18, 2025

CVE-2025-6599

Description

An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.

Affected products

Zyxel/DX3300-T0llm-fuzzy
Range: <=5.50(ABVY.6.3)C0
Zyxel/DX3301-T0 firmwarev5
Range: <= 5.50(ABVY.6.3)C0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-uncontrolled-resource-consumption-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-11-18-2025mitrevendor-advisory

News mentions

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