CVE-2025-13914: Juniper Apstra

High severity, CVSS 8.1. EPSS: 0.3% chance of exploitation in the next 30 days.

A Key Exchange without Entity Authentication vulnerability in the SSH implementation of Juniper Networks Apstra allows a unauthenticated, MITM attacker to impersonate managed devices. Due to insufficient SSH host key validation an attacker can perform a machine-in-the-middle attack on the SSH connections from Apstra to managed devices, enabling an attacker to impersonate a managed device and capture user credentials. This issue affects all versions of Apstra before 6.1.1.

Affected products

• Juniper Apstra: before 6.1.1 (fixed in 6.1.1)

Published 2026-04-09. Last modified 2026-10-07.