On 2024-12-03, CISA added CVE-2024-11667 (Zyxel Multiple Firewalls) to its Known Exploited Vulnerabilities (KEV) catalog [2]. The vulnerability is listed in the catalog as "Zyxel Multiple Firewalls Path Traversal Vulnerability" [2]. CISA requires remediation in accordance with the listed vendor mitigation guidance; see the original text in the body for specific requirements [2].
Backfill: this event became public on Dec 3, 2024 and we added it on Nov 10, 2026. It is not a new event.
CISA Adds Zyxel Multiple Firewalls Vulnerability CVE-2024-11667 to Known Exploited Vulnerabilities Catalog
1 min read
- Disclosed
- Dec 3, 2024
- Published
- Nov 10, 2026
- Last updated
- Nov 8, 2026
- CVSS basis
- Our assessment
- 3%, higher than 87% of CVEs
- Exploitation and patch status
- ExploitedKEV
- Attack vector
- Vulnerability status
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Government, Cross-industry
What to do nowOur advice
CISA requires remediation in accordance with the listed vendor mitigation guidance; see the original text in the body for specific requirements [2].
Timeline
Technical details
CISA KEV Listing Record
CISA added CVE-2024-11667 (Zyxel Multiple Firewalls) to the Known Exploited Vulnerabilities () catalog on 2024-12-03 [2].
Original Technical Description
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. [2]
Official Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. [2]
Individual Vulnerability Record
The U.S. National Vulnerability Database (NVD) provides an independent vulnerability record and description for CVE-2024-11667 [1].
References
Official / primary3
- [1]
“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 V”
- [2]
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.