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Vulnerabilities/CVE-2024-11667Public Intelligence Dossier
Source: zyxel · Limited verification•Last verified: •Collection Degraded
CVE-2024-11667ListedCRITICAL (raw)CVSS 9.8CWE-22

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.

Published: 27 Nov 2024•Last updated: 05 Aug 2026, 10:46 AM IST•Source identifier: security@zyxel.com.tw
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added03 Dec 2024
Due24 Dec 2024
RansomwareKnown
CVSS score
9.8CRITICAL (raw)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metric sourcenvd@nist.gov
EPSS probability
3%0.030
Percentile87th
Weakness type
CWE-22
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; SOC ecosystem technology relevance; CRITICAL severity; Known exploitation signal from CISA KEV or ransomware metadata; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • zyxel zld · >= 5.00 <= 5.38; >= 5.10 <= 5.38 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:usg_flex_100ax:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched kev-network-exposure (CVSS AV:N, CISA KEV Listed); path-traversal (CWE-22)

Exposure

  1. Identify assets with the exact CVE and confirm the affected product/version against the advisory.Telemetry: DeviceTvmSoftwareVulnerabilities · KEV listing raises urgency, but inventory is needed to establish local exposure. · Rule kev-network-exposure
  2. Locate affected deployments and the path-handling endpoint named by the advisory.Telemetry: Application access logs · The affected path must come from the source, not the CWE alone. · Rule path-traversal

Exploitation evidence

  1. Review relevant edge or application access logs for unusual requests around the advisory window.Telemetry: CommonSecurityLog · Log review is a hunting hypothesis; KEV listing alone does not show local exploitation. · Rule kev-network-exposure
Show more (2)

Exploitation evidence

  1. Review requests to that endpoint for traversal encodings and unusual file responses.Telemetry: Application access logs · Such patterns are a hypothesis to validate against normal traffic. · Rule path-traversal

Response

  1. Recheck the affected assets after the source-stated mitigation or update is applied.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies local remediation. · Rule kev-network-exposure

CISA KEV Record

Catalog entry
03 Dec 2024
Required action due
24 Dec 2024
Known ransomware use
Known

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Change History & Source Data

— No recorded material change

CNA / source
security@zyxel.com.tw
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:*, cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2024-12-03zyxel.comSource recordnvd.nist.govSource recordcisa.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2024-11667
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2024-11667
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2024-11667"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.