KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2024-11667

ATP series firmware Path Traversal

Zyxel / ATP series firmware · 5.00 to <= 5.38

View live feed Monitor via API
Severity
CVSS 7.5 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
3.0%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2024-11667 is an unauthenticated vulnerability affecting Zyxel ATP series firmware and 3 other products. A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Zyxel / ATP series firmware 5.00 to <= 5.38.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

ATP series firmware Path Traversal

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.

Vendor Product Affected Status
zyxel usg_flex_firmware Through 5.38 Affected
zyxel atp_firmware Through 5.38 Affected
zyxel usg20-vpn_firmware Through 5.38 Affected
zyxel usg_flex_50w_firmware Before 5.38 Affected
Zyxel ATP series firmware versions V5.00 through V5.38 Affected
Zyxel USG FLEX series firmware versions V5.00 through V5.38 Affected
Zyxel USG FLEX 50(W) series firmware versions V5.10 through V5.38 Affected
Zyxel USG20(W)-VPN series firmware versions V5.10 through V5.38 Affected
View vendor advisory (opens in new tab)
Published
27 Nov 2024
Exploitation Reported
03 Dec 2024
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

edge ransomware malware cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2024-11667
  • Vendor Advisory — zyxel.com zyxel.com · Vendor Advisory https://www.zyxel.com/global/en/support/security-advisories/zyxel-sec...

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 03 Dec 2024

Independent exploitation attestation added to the KEV Intelligence record.

Used in malware

CISA

Recorded 03 Dec 2024

Malware families have been linked to exploitation of this CVE.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

Learn about Pro API access
Source Added
CISA First 2024-12-03 00:00 UTC
CVE 2026-08-05 04:30 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

3.0%

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-22

Timeline

From disclosure to observed exploitation

  1. KEV confirmed by CVE

    Exploitation attested by an external source

  2. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. First public exploitation report

    Exploit observed in malware

  4. CVE published

    Vulnerability disclosed publicly

  5. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

View Pro pricing Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2024-11667

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2024-11667",
  "confidence": "Confirmed",
  "cvss_score": 7.5,
  "cvss_estimated": false,
  "epss_score": 0.03017,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

Early warning alerts

Get alerts on high-impact exploitation

Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.

Occasional high-impact alerts. Unsubscribe anytime. See our Privacy Policy.