How severe is CVE-2024-11667?

CVE-2024-11667 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-11667 being actively exploited?

Yes. CVE-2024-11667 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-12-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2024-11667?

CVE-2024-11667 affects Zyxel Zld. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-11667?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2024-11667 have an EU (EUVD) identifier?

Yes. CVE-2024-11667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-34151. It is also flagged as exploited in the EUVD (since 2024-12-03).

When was CVE-2024-11667 published?

CVE-2024-11667 was published on 2024-11-27 and last updated on 2026-06-17.

CVE-2024-11667

CVE-2024-11667 is a high-severity vulnerability in Zyxel Zld with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-12-03). The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-12-03)
EU (EUVD) id: EUVD-2024-34151
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-12-03)
Weakness: CWE-22
Affected product: Zyxel Zld
Published: 2024-11-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-11667?: 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.
How severe is CVE-2024-11667?: CVE-2024-11667 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-11667 being actively exploited?: Yes. CVE-2024-11667 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-12-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2024-11667?: CVE-2024-11667 affects Zyxel Zld. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-11667?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2024-11667 have an EU (EUVD) identifier?: Yes. CVE-2024-11667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-34151. It is also flagged as exploited in the EUVD (since 2024-12-03).
When was CVE-2024-11667 published?: CVE-2024-11667 was published on 2024-11-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*

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