CVE-2024-11667

HIGH7.5

CISA KEV

Published 2024-11-27 · Updated 2026-08-05 · Source security@zyxel.com.tw

Summary

CVE-2024-11667 is a high-severity (CVSS 7.5) vulnerability in Zyxel Multiple Firewalls. CISA added it to the Known Exploited Vulnerabilities catalog on December 3, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by December 24, 2024. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Zyxel has 13 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 13 known-exploited Zyxel vulnerabilities →

Description

A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through V5.38 could allow an attacker to download or upload files via a crafted URL.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-22

CISA Known-Exploited Vulnerability

Product: Zyxel — Multiple Firewalls

Name: Zyxel Multiple Firewalls Path Traversal Vulnerability

Date added: 2024-12-03 · Due: 2024-12-24

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

View on NVD

More exploited Zyxel vulnerabilities

Most recently added to CISA KEV

CVE-2026-7273
GS1900 Series Switches — Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
added 2026-09-21
CVE-2024-40891
DSL CPE Devices — Zyxel DSL CPE OS Command Injection Vulnerability
added 2025-02-11
CVE-2024-40890
DSL CPE Devices — Zyxel DSL CPE OS Command Injection Vulnerability
added 2025-02-11
CVE-2017-6884
RANSOMWARE
EMG2926 Routers — Zyxel EMG2926 Routers Command Injection Vulnerability
added 2023-09-18
CVE-2017-18368
P660HN-T1A Routers — Zyxel P660HN-T1A Routers Command Injection Vulnerability
added 2023-08-07
CVE-2023-27992
Multiple Network-Attached Storage (NAS) Devices — Zyxel Multiple NAS Devices Command Injection Vulnerability
added 2023-06-23

View all →

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