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CVE

CVE-2022-2030

A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identi

A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.11 through 4.72, that could allow an authenticated attacker to access some restricted files on a vulnerable device.

MEDIUM · CVSS 6.5 EPSS 0.01262
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

25
zyxel usg flex 100w firmware>= 4.50 and <= 5.30
zyxel usg flex 200 firmware>= 4.50 and <= 5.30
zyxel usg flex 500 firmware>= 4.50 and <= 5.30
zyxel usg flex 700 firmware>= 4.50 and <= 5.30
zyxel usg flex 50w firmware>= 4.20 and <= 5.30
zyxel usg20w-vpn firmware>= 4.20 and <= 5.30
zyxel atp800 firmware>= 4.32 and <= 5.30
zyxel atp700 firmware>= 4.32 and <= 5.30
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@zyxel.com.tw
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Jul 2022 · 06:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtmlVendor Advisory
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