Zyxel

CVE-2026-107441: An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 10 Nov 2026.

VulnCheck KEV lists it since 3 Nov 2026. It cites 1 public report, the first from 3 Nov 2026.

binarly.io

How likely is exploitation in the next 30 days?

0.3%

EPSS score, percentile 22.2 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

8.8 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

<= 2.90(AAHK.2)C0
<= 2.90(AAHH.2)C0
<= 2.90(AAHI.2)C0
<= 2.90(AAZI.2)C0
<= 2.90(AAHJ.2)C0
<= 2.90(AAHL.2)C0

and 4 more in the table below

Versions by product

Source: CISA KEV 2026.11.10, as of 10 Nov 2026; VulnCheck KEV, as of 12 Nov 2026; FIRST EPSS, as of 12 Nov 2026; CVE List, as of 12 Nov 2026. About the data.

Description

An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Source: CVE List, as of 12 Nov 2026. About the data.

What to do

Advisories and patches

zyxel.com (Vendor advisory)

This summary is based on the CVE record as of 12 Nov 2026. Check the vendor's advisory before you act: affected versions and fixes can change.