CVE-2024-11667
Zyxel Multiple Firewalls Path Traversal Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 December 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.93% probability · 87th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 December 2024 · due 24 December 2024 · used in ransomware campaigns
- Weakness
- CWE-22
- Affected
- zyxel/zld
- Source
- security@zyxel.com.tw
EPSS 2.9% since 30 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-protecting-against-recent-firewall-threats-11-21-2024 ; https://nvd.nist.gov/vuln/detail/CVE-2024-11667
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.