CASCACascade Atlas

Evidence dossier

CVE-2024-11667

CVE-2024-11667

62.2–83.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Nov 27, 2024
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

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

FIRST EPSS3.02%

2026-07-18 · v2026.06.15 · percentile 85.9%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

Zyxeloriginal assertion
container

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.

CISA KEVoriginal assertion
observed_exploitation

Zyxel Multiple Firewalls Path Traversal Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.030170000000; percentile 0.859380000000

Applicability

Cited product scope

Trace impact →
zyxelatp_firmware
[{"status": "affected", "version": "5.00", "versionType": "custom", "lessThanOrEqual": "5.38"}]unknown
zyxelusg20-vpn_firmware
[{"status": "affected", "version": "5.10", "versionType": "custom", "lessThanOrEqual": "5.38"}]unknown
zyxelusg_flex_50w_firmware
[{"status": "affected", "version": "5.10", "lessThan": "5.38", "versionType": "custom"}]unknown
zyxelusg_flex_firmware
[{"status": "affected", "version": "5.00", "versionType": "custom", "lessThanOrEqual": "5.38"}]unknown
ZyxelATP series firmware
[{"status": "affected", "version": "versions V5.00 through V5.38"}]unknown
ZyxelUSG20(W)-VPN series firmware
[{"status": "affected", "version": "versions V5.10 through V5.38"}]unknown
ZyxelUSG FLEX 50(W) series firmware
[{"status": "affected", "version": "versions V5.10 through V5.38"}]unknown
ZyxelUSG FLEX series firmware
[{"status": "affected", "version": "versions V5.00 through V5.38"}]unknown
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_100ax:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*; start including 5.00; end including 5.38supported
Unknown vendorUnknown product
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*; start including 5.00; end including 5.38supported
Unknown vendorUnknown product
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*; start including 5.10; end including 5.38supported
Unknown vendorUnknown product
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*; start including 5.10; end including 5.38supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5
security@zyxel.com.twCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5
ZyxelCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.