【Vulnerability Alert】Critical Security Vulnerability in Junos OS MX Series (CVE-2026-33785)

• Subject: 【Vulnerability Alert】Critical Security Vulnerability in Junos OS MX Series (CVE-2026-33785)

• Description:
  • Forwarded from Taiwan Computer Emergency Response Team / Coordination Center (TWCERT/CC) Security Alert: TWCERTCC-200-202604-00000007.
  • A critical security vulnerability exists in the CLI of Juniper Networks Junos OS MX Series switches (CVE-2026-33785, CVSS: 8.8). This vulnerability allows an authenticated low-privileged user to execute unauthorized high-privileged commands, potentially leading to unauthorized control of the device.
• Affected Platforms:
  • Junos OS MX Series: Versions prior to 24.4R2-S3 (exclusive)
  • Junos OS MX Series: Version 25.2R2
• Recommended Actions:
  • Please update to Junos OS MX Series versions 24.4R2-S3, 25.2R2, 25.4R1 or later.
• Reference:
  1. https://www.twcert.org.tw/tw/cp-169-10827-3ed3c-1.html

Computer and Communication Center
Network System Division