CVE-2025-59980 Junos OS: When a user with the name ftp or anonymous is configured unauthenticated filesystem access is allowed

Medium 6.9 Published 9 Oct 2025 Updated 10 Oct 2025

Unauthenticated attackers can access files if FTP is enabled with specific user names, requiring configuration changes to mitigate.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-59980?

CVE-2025-59980 is a medium-severity authentication bypass vulnerability in Juniper Junos, published on 9 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Authentication Bypass by Primary Weakness

in the FTP server of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to get limited read-write access to files on the device. When the FTP server is enabled and a user named "ftp" or "anonymous" is configured, that user can login without providing the configured password and then has read-write access to their home directory.

This issue affects Junos OS:

* all versions before 22.4R3-S8, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2.

Weakness: CWE-305

Which versions are affected by CVE-2025-59980?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2025-59980?

No fix has been published for CVE-2025-59980 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-59980 being exploited?

There is no known exploitation of CVE-2025-59980 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-2r3j-v23v-hx4j.