Zyxel GS1900 switches and APs hit by out-of-bounds write and buffer overflow
Original title: Zyxel security advisory (AV26-1114)
Zyxel security advisory AV26-1114 reports out-of-bounds write in GS1900 series switches and buffer overflow in APs FWA7 Security Routers; users should apply updates.
As of November 3, 2026, Zyxel is affected by vulnerabilities in Zyxel GS1900 series switches Multiple versions and models and Zyxel APs FWA7 and Security Routers Multiple versions and models. The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available. Zyxel security advisory for out-of-bounds write vulnerability in GS1900 series switches and for buffer overflow vulnerability in certain APs FWA7 and Security Routers.
Unconfirmed: No CVE id or further details on exploitation stated in advisory
- - Zyxel GS1900 series switches Multiple versions and models affected
- - Out-of-bounds write vulnerability in GS1900 series
- - Buffer overflow vulnerability in APs FWA7 Security Routers
- - Multiple versions and models impacted
- - Cyber Centre issued serial AV26-1114
Impact: Out-of-bounds write and buffer overflow in Zyxel devices
- 1.Apply Zyxel security updates
- 2.Review provided web links and apply updates
From the original article
1 min read at cyber.gc.ca
Serial number: AV26-1114 Date: November 3, 2026 As of November 3, 2026, Zyxel is affected by vulnerabilities in the following products: Zyxel GS1900 series switches Multiple versions and models Zyxel APs, FWA7, and Security Routers Multiple versions and models The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.
cyber.gc.ca
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