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Technical advisory

Zyxel security advisory (AV26-603) – Update 1

Official source
EudorIA operational summary

What it means

Priority 70/100

Zyxel ha pubblicato un advisory (AV26-603) per vulnerabilità nei GS1900 series switches. CISA ha aggiunto CVE-2026-7273 al KEV Database. L'attacco mira a sfruttare un buffer overflow stack. La patch è disponibile ma non è chiaro se l'exploit sia attivo in rete.

Why it matters

Le PMI italiane utilizzano spesso dispositivi di rete come GS1900 series switches. Una vulnerabilità non patchata potrebbe permettere attacchi di tipo buffer overflow, portando a compromissione o interruzione del servizio. La mancanza di patch potrebbe esporre l'azienda a rischi significativi.

Potential operational benefits

  • Riduzione della superficie esposta a vulnerabilità note
  • Miglioramento della visibilità e del controllo sul traffico di rete
  • Minimizzazione del rischio di compromissione di dispositivi di rete
Indications to confirm against the customer's technical and organisational perimeter.
Relevant controlsPatch managementFirewall NGFW / IPSSegmentazione di reteMonitoraggio / SIEM
AudienceITSOC
Information centre

Translation in progress

Canadian Centre for Cyber Security

The official content is available in the original language. The Italian version will be published once automated checks are complete.

Text acquired from the source

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 Security Agency (CISA) added CVE-2026-7273 to their Known Exploited Vulnerabilities (KEV) Database. The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates. Zyxel security advisory for stack-based buffer overflow vulnerability in GS1900 series switches Zyxel Advisories CISA KEV: CVE-2026-7273

Source
Canadian Centre for Cyber Security (Canada)
Publishing entity
Canadian Centre for Cyber Security
Entity type
National CSIRT
Area
North America · CA
Original language
en · translation in preparation
Publication
21/09/2026 22:12
MITRE ATT&CK
T1190
CVE
CVE-2026-7273
Stated country
CA
Technical scope

Affected products and versions

Verification in progress
Information not yet acquired.

The collector will check NVD and the available official vendor advisories.

Open the original source