CVE-2022-40603

Home/CVE/A cross-site scripting (XSS) vulnerability in the CGI program of Zyxel ZyWALL/USG series firmware versions 4.30 through

CVE

A cross-site scripting (XSS) vulnerability in the CGI program of Zyxel ZyWALL/USG series firmware versions 4.30 through

A cross-site scripting (XSS) vulnerability in the CGI program of Zyxel ZyWALL/USG series firmware versions 4.30 through 4.72, VPN series firmware versions 4.30 through 5.31, USG FLEX series firmware versions 4.50 through 5.31, and ATP series firmware versions 4.32 through 5.31, which could allow an attacker to trick a user into visiting a crafted URL with the XSS payload. Then, the attacker could gain access to some browser-based information if the malicious script is executed on the victim’s browser.

MEDIUM · CVSS 4.7 EPSS 0.00673

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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Affected Products & Versions

zyxel atp800 firmware>= 4.32 and <= 5.31
zyxel atp700 firmware>= 4.32 and <= 5.31
zyxel atp500 firmware>= 4.32 and <= 5.31
zyxel atp200 firmware>= 4.32 and <= 5.31
zyxel atp100 firmware>= 4.32 and <= 5.31
zyxel atp100w firmware>= 4.32 and <= 5.31
zyxel usg flex 100w firmware>= 4.50 and <= 5.31
zyxel usg flex 200 firmware>= 4.50 and <= 5.31
Show all 19 affected productszyxel usg flex 500 firmware>= 4.50 and <= 5.31
zyxel usg flex 700 firmware>= 4.50 and <= 5.31
zyxel usg flex 50w firmware>= 4.50 and <= 5.31
zyxel vpn1000 firmware>= 4.30 and <= 5.31
zyxel vpn300 firmware>= 4.30 and <= 5.31
zyxel vpn100 firmware>= 4.30 and <= 5.31
zyxel vpn50 firmware>= 4.30 and <= 5.31
zyxel usg40 firmware>= 4.30 and <= 4.72
zyxel usg40w firmware>= 4.30 and <= 4.72
zyxel usg60 firmware>= 4.30 and <= 4.72
zyxel usg60w firmware>= 4.30 and <= 4.72

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Scoring & Timeline

4.7

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 NVD06 Dec 2022 · 02:15 AM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

Technical impact

partial

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-xss-vulnerability-in-firewallsVendor Advisory

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