CVE-2022-22183: Juniper Junos OS Evolved

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows a network-based unauthenticated attacker who is able to connect to a specific open IPv4 port, which in affected releases should otherwise be unreachable, to cause the CPU to consume all resources as more traffic is sent to the port to create a Denial of Service (DoS) condition. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS Evolved 20.4 versions prior to 20.4R3-S2-EVO; 21.1 versions prior to 21.1R3-S1-EVO; 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-EVO; 21.4 versions prior to 21.4R2-EVO. This issue does not affect Junos OS.

Affected products

• Juniper Junos OS Evolved: version 20.4 only; version 21.1 only; version 21.2 only; version 21.3 only; version 21.4 only

Published 2022-04-14. Last modified 2026-06-17.