CVE-2024-39537: Juniper Junos OS Evolved

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved on ACX 7000 Series allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device. Due to a wrong initialization, specific processes which should only be able to communicate internally within the device can be reached over the network via open ports. This issue affects Junos OS Evolved on ACX 7000 Series: * All versions before 21.4R3-S7-EVO, * 22.2-EVO versions before 22.2R3-S4-EVO, * 22.3-EVO versions before 22.3R3-S3-EVO, * 22.4-EVO versions before 22.4R3-S2-EVO, * 23.2-EVO versions before 23.2R2-EVO, * 23.4-EVO versions before 23.4R1-S1-EVO, 23.4R2-EVO.

Affected products

• Juniper Junos OS Evolved: before 21.4 (fixed in 21.4); version 21.4 only; version 22.2 only; version 22.3 only; version 22.4 only; version 23.2 only; …

Published 2024-07-11. Last modified 2026-06-17.