Zyxel security advisory (AV26-603) – Update 1

T1Covered by 1 source · first reported by Canadian Centre for Cyber Security at 21 Sept, 20:12 UTC

Serial number: AV26-603 Date: June 16, 2026 Updated: September 21, 2026 On June 16, 2026, Zyxel published a security advisory to address vulnerabilities in the following products: GS1900 series switches – multiple versions and models Update 1 On September 21, 2026, Cybersecurity and Infrastructure…

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Sources

• T1Zyxel security advisory (AV26-603) – Update 1Canadian Centre for Cyber Security21 Sept, 20:12