PT-2025-47236 · Zyxel · Zyxel Dx3301-T0

Published 2025-11-18 · Updated 2025-12-17 · CVE-2025-6599

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Zyxel DX3301-T0 versions 5.50(ABVY.6.3)C0 and earlier

Description An uncontrolled resource consumption issue in the web server component of the software could allow an attacker to perform Slowloris-style denial-of-service (DoS) attacks. These attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.

Recommendations Update to a newer version than 5.50(ABVY.6.3)C0.

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2025-16286

CVE-2025-6599

Affected Products

Zyxel Dx3301-T0

References · 7

• https://osv.dev/vulnerability/CVE-2025-6599 · Vendor Advisory
• https://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-11-18-2025 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-6599 · Security Note
• https://bdu.fstec.ru/vul/2025-16286 · Security Note
• https://twitter.com/dailycve/status/2001119257891881223 · Twitter Post
• https://t.me/CVEtracker/37570 · Telegram Post
• https://twitter.com/autumn_good_35/status/1990813997289881620 · Twitter Post