A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI…

Description

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.

Scores

EPSS (exploitation in 30 days)

1.4% · top 28% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (opens in a new tab)All about CWE-22 and its CVEs

Affected products

• Zyxel · USG FLEX 100(W) firmware

  • affected 4.50 through 5.30

• Zyxel · USG FLEX 200 firmware

  • affected 4.50 through 5.30

• Zyxel · USG FLEX 500 firmware

  • affected 4.50 through 5.30

• Zyxel · USG FLEX 700 firmware

  • affected 4.50 through 5.30

• Zyxel · ATP series firmware

  • affected 4.32 through 5.30

• Zyxel · VPN series firmware

  • affected 4.30 through 5.30

• Zyxel · USG FLEX 50(W) firmware

  • affected 4.16 through 5.30

• Zyxel · USG 20(W)-VPN firmware

  • affected 4.16 through 5.30

• Zyxel · USG/ZyWALL series firmware

  • affected 4.11 through 4.72

References (1)

• https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtml (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-2030](https://trackcve.app/badge/CVE-2022-2030.svg)](https://trackcve.app/cve/CVE-2022-2030)

Record last updated 3 Aug 2024, 00:24 UTC.