CVE-2025-13914: Juniper Networks Apstra MITM vulnerability in SSH implementation

CVE-2025-13914 · Severity: high · CVSS 8.7 · Published 2026-04-09

Juniper Networks Apstra, a platform used to manage and automate data center networks, contains a security flaw in how it connects to managed devices. An attacker positioned between Apstra and the network equipment can impersonate a legitimate device, potentially allowing them to steal administrative credentials and gain unauthorized access to network infrastructure. This could lead to a full compromise of managed network devices and significant operational disruption.

Vendors: Juniper.

Quick answers

Is CVE-2025-13914 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-13914 being exploited in the wild.
How severe is CVE-2025-13914?
High severity, with a CVSS score of 8.7, published 9 April 2026.
Which products and versions are affected?
Juniper Networks Apstra All versions before 6.1.1.
Is there a fix for CVE-2025-13914?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-13914 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-13914?
Check whether you run Juniper Apstra. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability exists in the SSH implementation of Juniper Networks Apstra due to insufficient SSH host key validation during the key exchange process (CWE-322). An unauthenticated attacker with network access between the Apstra controller and managed devices can perform a machine-in-the-middle (MITM) attack. By successfully impersonating a managed device, the attacker can intercept SSH traffic and capture user credentials used for device management. This issue affects all versions of Apstra prior to 6.1.1, where the fix was implemented.

Affected products

  • Juniper Networks Apstra All versions before 6.1.1

Timeline

  • 2026-04-09: advisory: Initial advisory published by Juniper Networks
  • 2026-04-09: disclosed
  • 2026-07-07: other: NVD last modified date

References

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