Evidence dossier

CVE-2022-30525

CVE-2022-30525

84.5–100.0Priority evidence range

As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

State: PUBLISHED
Published: May 12, 2022
Updated: Oct 21, 2025
Evidence coverage: 72%

CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS99.94%

2026-07-18 · v2026.06.15 · percentile 100.0%

Source stateConflict visible

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

Source comparison

Who said what

CISA-ADPindependent enrichment

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CISA ADP Vulnrichment

Jul 19, 2026Original evidence ↗

CVEderivative copy

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CVE Program Container

Jul 19, 2026Original evidence ↗

Zyxeloriginal assertion

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A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

Jul 19, 2026Original evidence ↗

CISA KEVoriginal assertion

observed_exploitation

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Jul 19, 2026Original evidence ↗

FIRST EPSSoriginal assertion

model_probability

Probability 0.999380000000; percentile 0.999700000000

Jul 19, 2026Original evidence ↗

Applicability

Cited product scope

Trace impact →

ZyxelATP series firmware

[{"status": "affected", "version": "5.10 through 5.21 Patch 1"}]unknown

ZyxelUSG 20(W)-VPN firmware

[{"status": "affected", "version": "5.10 through 5.21 Patch 1"}]unknown

ZyxelUSG FLEX 100(W) firmware

[{"status": "affected", "version": "5.00 through 5.21 Patch 1"}]unknown

ZyxelUSG FLEX 200 firmware

[{"status": "affected", "version": "5.00 through 5.21 Patch 1"}]unknown

ZyxelUSG FLEX 500 firmware

[{"status": "affected", "version": "5.00 through 5.21 Patch 1"}]unknown

ZyxelUSG FLEX 50(W) firmware

[{"status": "affected", "version": "5.10 through 5.21 Patch 1"}]unknown

ZyxelUSG FLEX 700 firmware

[{"status": "affected", "version": "5.00 through 5.21 Patch 1"}]unknown

ZyxelVPN series firmware

[{"status": "affected", "version": "4.60 through 5.21 Patch 1"}]unknown

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:usg20w-vpn:-:*:*:*:*:*:*:*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_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:h:zyxel:vpn100:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*; start including 5.00; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*; start including 5.00; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*; start including 5.00; end including 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*; start including 5.10; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*; start including 5.00; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*; start including 4.60; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*; start including 4.60; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*; start including 4.60; end excluding 5.30supported

Unknown vendorUnknown product

cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*; start including 4.60; end excluding 5.30supported

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

10.0

nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:C/I:C/A:C

9.8

security@zyxel.com.twCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8

ZyxelCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.