# CVE-2024-11667: Zyxel Multiple Firewalls Path Traversal Vulnerability

Source: https://junglewise.ai/threats/cve-2024-11667-zyxel-multiple-firewalls-path-traversal-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-12-03. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2024-11667 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2024-12-03

A directory traversal vulnerability in the web management interface of multiple Zyxel firewall series allows a remote attacker to download or upload files via a crafted URL. The flaw affects ATP, USG FLEX, and USG20(W)-VPN series running specific firmware versions between V5.00 and V5.38.

Technologies: [Zyxel Firewalls](https://junglewise.ai/threats/technologies/firewalls), [Zyxel Multiple Firewalls](https://junglewise.ai/threats/technologies/multiple-firewalls). Vendors: [Zyxel](https://junglewise.ai/threats/vendors/zyxel).

## Quick answers

**Is CVE-2024-11667 exploited in the wild?** Yes. CVE-2024-11667 is known to be exploited in the wild, first recorded on 3 December 2024. Treat it as urgent.

**How severe is CVE-2024-11667?** Critical severity, with a CVSS score of 9.8, published 3 December 2024.

**Which products and versions are affected?** Zyxel ATP series firmware V5.00 through V5.38; Zyxel USG FLEX series firmware V5.00 through V5.38; Zyxel USG FLEX 50(W) series firmware V5.10 through V5.38; Zyxel USG20(W)-VPN series firmware V5.10 through V5.38.

**Is there a fix for CVE-2024-11667?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2024-11667 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2024-11667?** Check whether you run Zyxel Firewalls or Zyxel Multiple Firewalls. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Zyxel ATP series firmware V5.00 through V5.38
- Zyxel USG FLEX series firmware V5.00 through V5.38
- Zyxel USG FLEX 50(W) series firmware V5.10 through V5.38
- Zyxel USG20(W)-VPN series firmware V5.10 through V5.38

## Timeline

- 2024-11-27: disclosed: Initial advisory by Zyxel Corporation
- 2024-11-27: other: NVD Published Date
- 2024-12-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2024-12-03: advisory: CISA advisory published

## Related threats

- [Zyxel Multiple Firewalls Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2023-33010-zyxel-multiple-firewalls-buffer-overflow-vulnerability)
- [Zyxel Multiple Firewalls Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2023-33009-zyxel-multiple-firewalls-buffer-overflow-vulnerability)
- [Zyxel Multiple Firewalls OS Command Injection Vulnerability](https://junglewise.ai/threats/cve-2023-28771-zyxel-multiple-firewalls-os-command-injection-vulnerability)
- [Zyxel Multiple Firewalls OS Command Injection Vulnerability](https://junglewise.ai/threats/cve-2022-30525-zyxel-multiple-firewalls-os-command-injection-vulnerability)