CVE-2024-11667: in the CISA KEV catalogue
Zyxel Multiple Firewalls Path Traversal Vulnerability. CISA added CVE-2024-11667 to the Known Exploited Vulnerabilities catalogue on 2024-12-03 with a default due date of 2024-12-24. Known ransomware campaign use: Known. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Zyxel Multiple Firewalls
- CWE
- CWE-22
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS
- 3.0%, percentile 87 (scored 2026-11-03)
EPSS puts about 3.0 in 100 odds (3.0%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 87% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2024-11667 in the CISA KEV catalogue?
Yes. CISA added CVE-2024-11667 (Zyxel Multiple Firewalls Path Traversal Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2024-12-03. CISA's default due date for it is 2024-12-24.
Is CVE-2024-11667 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2024-11667.
What should I do about CVE-2024-11667?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2024-11667