CVE-2026-107441 PUBLISHED

Assigner: Zyxel
Reserved: 08.10.2026 Published: 03.11.2026 Updated: 03.11.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Zyxel
Product	GS1900-24E firmware
Versions	Default: unaffected Version <= 2.90(AAHK.2)C0 is affected

Vendor	Zyxel
Product	GS1900-8 firmware
Versions	Default: unaffected Version <= 2.90(AAHH.2)C0 is affected

Vendor	Zyxel
Product	GS1900-8HP firmware
Versions	Default: unaffected Version <= 2.90(AAHI.2)C0 is affected

Vendor	Zyxel
Product	GS1900-10HP firmware
Versions	Default: unaffected Version <= 2.90(AAZI.2)C0 is affected

Vendor	Zyxel
Product	GS1900-16 firmware
Versions	Default: unaffected Version <= 2.90(AAHJ.2)C0 is affected

Vendor	Zyxel
Product	GS1900-24 firmware
Versions	Default: unaffected Version <= 2.90(AAHL.2)C0 is affected

Vendor	Zyxel
Product	GS1900-24EP firmware
Versions	Default: unaffected Version <= 2.90(ABTO.2)C0 is affected

Vendor	Zyxel
Product	GS1900-HPv2 firmware
Versions	Default: unaffected Version <= 2.90(ABTP.2)C0 is affected

Vendor	Zyxel
Product	GS1900-48 firmware
Versions	Default: unaffected Version <= 2.90(AAHN.2)C0 is affected

Vendor	Zyxel
Product	GS1900-48HPv2 firmware
Versions	Default: unaffected Version <= 2.90(ABTQ.2)C0 is affected

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

Problem Types

CWE-787 Out-of-bounds write CWE