Is CVE-2026-107441 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107441 being exploited in the wild.

How severe is CVE-2026-107441?

High severity, with a CVSS score of 8.8, published 3 November 2026.

Which products and versions are affected?

Zyxel GS1900-10HP through 2.90(AAZI.2)C0; Zyxel GS1900-16 through 2.90(AAHJ.2)C0; Zyxel GS1900-24 through 2.90(AAHL.2)C0; Zyxel GS1900-24E through 2.90(AAHK.2)C0; and 6 more.

Is there a fix for CVE-2026-107441?

Yes: fixed in GS1900-8 2.90(AAHH.3)C0; GS1900-8HP 2.90(AAHI.3)C0; GS1900-10HP 2.90(AAZI.3)C0; GS1900-16 2.90(AAHJ.3)C0; GS1900-24 2.90(AAHL.3)C0; GS1900-24E 2.90(AAHK.3)C0; GS1900-24EP 2.90(ABTO.3)C0; GS1900-24HPv2 2.90(ABTP.3)C0; GS1900-48 2.90(AAHN.3)C0; GS1900-48HPv2 2.90(ABTQ.3)C0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107441 attacked?

It is attacked from the adjacent network or over the network, in a network appliance.

Am I affected by CVE-2026-107441?

Check whether you run Zyxel GS1900-10HP, Zyxel GS1900-16, Zyxel GS1900-24 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107441: Zyxel GS1900 out-of-bounds write in CGI program

CVE-2026-107441 · Severity: high · CVSS 8.8 · Published 2026-11-03

Zyxel GS1900 series network switches have a critical flaw in their web management interface that allows attackers on the local network to execute arbitrary commands without authentication. An attacker can send a specially crafted request through the switch's HTTP interface to trigger a memory corruption vulnerability that leads to complete system compromise.

Vendors: Zyxel.

Quick answers

Is CVE-2026-107441 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107441 being exploited in the wild.
How severe is CVE-2026-107441?: High severity, with a CVSS score of 8.8, published 3 November 2026.
Which products and versions are affected?: Zyxel GS1900-10HP through 2.90(AAZI.2)C0; Zyxel GS1900-16 through 2.90(AAHJ.2)C0; Zyxel GS1900-24 through 2.90(AAHL.2)C0; Zyxel GS1900-24E through 2.90(AAHK.2)C0; and 6 more.
Is there a fix for CVE-2026-107441?: Yes: fixed in GS1900-8 2.90(AAHH.3)C0; GS1900-8HP 2.90(AAHI.3)C0; GS1900-10HP 2.90(AAZI.3)C0; GS1900-16 2.90(AAHJ.3)C0; GS1900-24 2.90(AAHL.3)C0; GS1900-24E 2.90(AAHK.3)C0; GS1900-24EP 2.90(ABTO.3)C0; GS1900-24HPv2 2.90(ABTP.3)C0; GS1900-48 2.90(AAHN.3)C0; GS1900-48HPv2 2.90(ABTQ.3)C0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107441 attacked?: It is attacked from the adjacent network or over the network, in a network appliance.
Am I affected by CVE-2026-107441?: Check whether you run Zyxel GS1900-10HP, Zyxel GS1900-16, Zyxel GS1900-24 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: GS1900-8 2.90(AAHH.3)C0; GS1900-8HP 2.90(AAHI.3)C0; GS1900-10HP 2.90(AAZI.3)C0; GS1900-16 2.90(AAHJ.3)C0; GS1900-24 2.90(AAHL.3)C0; GS1900-24E 2.90(AAHK.3)C0; GS1900-24EP 2.90(ABTO.3)C0; GS1900-24HPv2 2.90(ABTP.3)C0; GS1900-48 2.90(AAHN.3)C0; GS1900-48HPv2 2.90(ABTQ.3)C0

Technical details

An out-of-bounds write vulnerability in the CGI program allows unauthenticated, adjacent attackers to execute OS commands via a crafted HTTP request. The flaw affects multiple GS1900 series switch models running firmware 2.90 with specific build versions through (AAHK.2)C0 and similar branches. Successful exploitation grants full command execution on the affected device.

Affected products

Zyxel GS1900-8 through 2.90(AAHH.2)C0
Zyxel GS1900-8HP through 2.90(AAHI.2)C0
Zyxel GS1900-10HP through 2.90(AAZI.2)C0
Zyxel GS1900-16 through 2.90(AAHJ.2)C0
Zyxel GS1900-24 through 2.90(AAHL.2)C0
Zyxel GS1900-24E through 2.90(AAHK.2)C0
Zyxel GS1900-24EP through 2.90(ABTO.2)C0
Zyxel GS1900-24HPv2 through 2.90(ABTP.2)C0
Zyxel GS1900-48 through 2.90(AAHN.2)C0
Zyxel GS1900-48HPv2 through 2.90(ABTQ.2)C0

Timeline

2026-11-03: advisory: Zyxel advisory released with patches

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-gs1900-series-switches-11-03-2026

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