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

Watch CVE-2024-11667 Browse KEV feed
Severity
CVSS 7.5 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
2.9%
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. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

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.

zyxel Affected
usg_flex_firmware
Through 5.38
zyxel Affected
atp_firmware
Through 5.38
zyxel Affected
usg20-vpn_firmware
Through 5.38
zyxel Affected
usg_flex_50w_firmware
Before 5.38
Zyxel Affected
ATP series firmware
versions V5.00 through V5.38
Zyxel Affected
USG FLEX series firmware
versions V5.00 through V5.38
Zyxel Affected
USG FLEX 50(W) series firmware
versions V5.10 through V5.38
Zyxel Affected
USG20(W)-VPN series firmware
versions V5.10 through V5.38
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 Previdian 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

A trusted third party reported exploitation.

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 Previdian 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
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian 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

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

2.9%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

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

Timeline

From disclosure to observed exploitation

  1. 04:30 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  2. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. 00:00 UTC

    First public exploitation report

    Exploit observed in malware

  4. 09:39 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 07:15 UTC

    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.

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  • 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

Sample API response 
{
  "cve_id": "CVE-2024-11667",
  "confidence": "Confirmed",
  "cvss_score": 7.5,
  "cvss_estimated": false,
  "epss_score": 0.02929,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}