Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
What it means
CISA Known Exploited Vulnerabilities ha pubblicato CVE-2026-7273 relativa a Zyxel GS1900 Series Switches. La vulnerabilita risulta gia sfruttata: la verifica di esposizione e prioritaria.
Why it matters
La fonte segnala sfruttamento attivo. La priorita dipende dalla presenza della tecnologia interessata nel perimetro; il testo acquisito non consente di dedurre ulteriori impatti tecnici.
Recommended actions
- Verificare immediatamente esposizione, versioni e indicatori di compromissione.
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's intern
- Confermare l'applicabilita consultando la fonte ufficiale e l'inventario asset.
- Pianificare mitigazione o aggiornamento secondo criticita e rischio di interruzione.
Translation in progress
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
Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
- Source
- CISA Known Exploited Vulnerabilities
- Publishing entity
- CISA
- Entity type
- National authority
- Area
- North America · US
- Original language
- en · translation in preparation
- Publication
- 21/09/2026 02:00
- CVE
- CVE-2026-7273
- Classification
- exploited
- Vendor
- Zyxel
- Product
- GS1900 Series Switches
- Stated country
- US
Affected products and versions
| Product | Affected release or range | Fix or verification required | Source |
|---|---|---|---|
| zyxelgs1900-8 firmware | prima di 2.90\(aahh.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-8hp firmware | prima di 2.90\(aahi.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-10hp firmware | prima di 2.90\(aazi.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-16 firmware | prima di 2.90\(aahj.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-24 firmware | prima di 2.90\(aahl.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-24e firmware | prima di 2.90\(aahk.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-24ep firmware | prima di 2.90\(abto.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-24hpv2 firmware | prima di 2.90\(abtp.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-48 firmware | prima di 2.90\(aahn.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| zyxelgs1900-48hpv2 firmware | prima di 2.90\(abtq.2\)c0, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
Action indicated by the source
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.