CVE-2022-45441 — A cross-site scripting (XSS) vulnerability in Zyxel NBG-418N v2 firmware version

A cross-site scripting (XSS) vulnerability in Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.13)C0, which could allow an attacker to store malicious scripts in the Logs page of the GUI on a vulnerable device. A successful XSS attack could force an authenticated user to e

01What is this vulnerability?

A cross-site scripting (XSS) vulnerability in Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.13)C0, which could allow an attacker to store malicious scripts in the Logs page of the GUI on a vulnerable device. A successful XSS attack could force an authenticated user to execute the stored malicious scripts and then result in a denial-of-service (DoS) condition when the user visits the…

02Affected products

Vendor	Product	Versions
Zyxel	NBG	418N v2 firmware — < V1.00(AARP.13)C0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-02-07T00:00:00.000Z
• Last modified: 2025-03-25T14:49:09.998Z

09References

• www.zyxel.com — https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advis…