CVE-2024-11667 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-11667CRITICAL

Zyxel Multiple Firewalls

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0302   86.4   YES

AFFECTED
  Product                         Versions                        Fixed
  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 –  —
  USG20(W)-VPN series firmware    versions V5.10 through V5.38 –  —

TIMELINE
  Nov 25  Reserved by Zyxel
  Dec 3   Added to CISA KEV, remediation due 2024-12-24
  Dec 3   Published (CNA: Zyxel)
  Aug 5   RESCORED — CVE-2024-11667 (Zyxel ATP series firmware). CVSS 7.5 → 9.8 (NVD).

CWE-22 · CNA: Zyxel · CVSS v3.1 · 2 references · NVD status: Analyzed · KEV due December 24, 2024

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
November 25, 2024	Reserved	Reserved by Zyxel
December 3, 2024	KEV ADDED	Added to CISA KEV, remediation due 2024-12-24
December 3, 2024	Published	Published (CNA: Zyxel)
August 5, 2026	RESCORED	RESCORED — CVE-2024-11667 (Zyxel ATP series firmware). CVSS 7.5 → 9.8 (NVD).

Affected

Affected products and packages — 4 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Zyxel	ATP series firmware	—	versions V5.00 through V5.38	—
Zyxel	USG FLEX series firmware	—	versions V5.00 through V5.38	—
Zyxel	USG FLEX 50(W) series firmware	—	versions V5.10 through V5.38	—
Zyxel	USG20(W)-VPN series firmware	—	versions V5.10 through V5.38	—

Weaknesses

CWE-22

References (2)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-11667 [US Government Resource]
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-protecting-against-recent-firewall-threats-11-27-2024 [Vendor Advisory]

Authoritative record: CVE-2024-11667 at cve.org

Vendors: zyxel

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-11667 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.