How severe is CVE-2024-11667?

CVE-2024-11667 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2024-11667?

Affected package information for CVE-2024-11667 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2024-11667?

No fixed version has been published for CVE-2024-11667 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2024-11667 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2024-11667, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2024-11667?

CVE-2024-11667 has an EPSS (Exploit Prediction Scoring System) score of 28.9%, placing it in the 97th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2024-11667 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2024-11667 (Zyxel Multiple Firewalls Path Traversal Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2024-12-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2024-12-24. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2024-11667?

CVE-2024-11667 is classified as Path Traversal (CWE-22). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2024-11667?

CVE-2024-11667 affects zyxel zld. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2024-11667 published, and has it been updated?

CVE-2024-11667 was published on November 27, 2024 and was last updated on October 27, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2024-12-03 — agencies required to remediate by 2024-12-24 · Ransomware

CVE-2024-11667

HIGH

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…

Published

Nov 27, 2024

Updated

Oct 27, 2025

Affected

0 pkgs

Patched

None yet

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

28.9%probability of exploitation in next 30 days

Moderate Risk97th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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 Products

1 product · 4 configurations

zldzyxel

≥ 5.10 && ≤ 5.38

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A directory traversal vulnerability in the web management interface of Z…

cisa.govCISADec 2024

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2024-11667 in your stack?

O3 detects CVE-2024-11667 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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