CVE-2026-7273
Prioritize patching. It under exploitation confirmed by CISA.
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.
A stack-based buffer overflow in the Zyxel GS1900-48HPv2 switch allows an attacker on the local network to send a specially crafted HTTP request that overflows memory and executes unauthorized commands on the device.
Stack-based buffer overflow in the CGI program of Zyxel GS1900-48HPv2 (firmware ≤2.90(ABTQ.1)C0) exploitable by unauthenticated LAN-based attackers via crafted HTTP requests, enabling arbitrary OS command execution with high impact on device integrity and confidentiality.