How severe is CVE-2022-30525?

CVE-2022-30525 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-30525 being actively exploited?

Yes. CVE-2022-30525 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-16, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2022-30525?

CVE-2022-30525 primarily affects Zyxel Usg Flex 100w Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-30525?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2022-30525 have an EU (EUVD) identifier?

Yes. CVE-2022-30525 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-52385. It is also flagged as exploited in the EUVD (since 2022-05-16).

When was CVE-2022-30525 published?

CVE-2022-30525 was published on 2022-05-12 and last updated on 2026-06-17.

CVE-2022-30525

CVE-2022-30525 is a critical-severity vulnerability in Zyxel Usg Flex 100w Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-16). The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-16)
EU (EUVD) id: EUVD-2022-52385
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-16)
Weakness: CWE-78
Affected product: Zyxel Usg Flex 100w Firmware
Published: 2022-05-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-30525?: 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.
How severe is CVE-2022-30525?: CVE-2022-30525 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-30525 being actively exploited?: Yes. CVE-2022-30525 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-16, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-30525?: CVE-2022-30525 primarily affects Zyxel Usg Flex 100w Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-30525?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-30525 have an EU (EUVD) identifier?: Yes. CVE-2022-30525 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-52385. It is also flagged as exploited in the EUVD (since 2022-05-16).
When was CVE-2022-30525 published?: CVE-2022-30525 was published on 2022-05-12 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*

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