CVE Watch25 de out. de 2026

CVE-2026-7273

Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability

CVSS

8.8

Alta

EPSS

2.8%

p86

KEV

SIM

21 de set. de 2026

Exploit Today

0-100

Publicado: 16 de jun. de 2026 · Última mod.: 25 de out. de 2026 · CWE-121

EPSS · 30d

2.5%EPSS · 30 dias2.8%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Zyxel / GS1900 Series Switches

Vulnerabilidade

Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability

Adicionado ao KEV

21 de set. de 2026

Corrigir até

24 de set. de 2026

Uso conhecido em ransomware

Não

Descrição resumida

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.

Ação necessária

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.

Notas

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-7273

Descrição técnica

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Referências oficiais

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