CVEs / CVE-2024-11667
CVE-2024-11667: Zyxel Multiple Firewalls Path Traversal Vulnerability
- Known exploited in the CISA KEV catalog since 3 Dec 2024
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 2.92% chance of exploitation in the next 30 days, higher than 87% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Multiple Zyxel firewalls contain a path traversal vulnerability in the web management interface that could allow an attacker to download or upload files via a crafted URL.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Zyxel ATP series firmware | versions V5.00 through V5.38 | — |
| Zyxel USG FLEX series firmware | versions V5.00 through V5.38 | — |
| Zyxel USG FLEX 50(W) series firmware | versions V5.10 through V5.38 | — |
| Zyxel USG20(W)-VPN series firmware | versions V5.10 through V5.38 | — |
| zyxel usg_flex_firmware | from 5.00, up to and including 5.38 | — |
| zyxel atp_firmware | from 5.00, up to and including 5.38 | — |
| zyxel usg20-vpn_firmware | from 5.10, up to and including 5.38 | — |
| zyxel usg_flex_50w_firmware | from 5.10, before 5.38 | 5.38 |
Exploitation
| In CISA KEV since | 3 Dec 2024 |
|---|---|
| Due date for US federal agencies | 24 Dec 2024 |
| Used in ransomware campaigns | Known |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-22 |
References
- CVE-2024-11667 on NVD
- CVE-2024-11667 in the CISA KEV catalog
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-protecting-against-recent-firewall-threats-11-21-2024 (cited by CISA)
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-protecting-against-recent-firewall-threats-11-27-2024 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-11667 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.