Juniper Networks Issues Emergency Patch for Critical PTX Router RCE Vulnerability

Juniper Networks released an emergency out-of-band security update for Junos OS Evolved to address CVE-2026-21902, a critical remote code execution (RCE) vulnerability with a CVSS score of 9.3. The flaw specifically impacts PTX routers running the affected operating system. The company issued the patch as an urgent measure, though no exact date for the release was provided. No details on exploitation in the wild or attack vectors were disclosed in the notice. Customers are explicitly urged to apply the update to mitigate potential risks.