What is CVE-2025-59980?

CVE-2025-59980 is a medium-severity vulnerability in Juniper Junos, classified under Authentication Bypass by Primary Weakness. CVSS score: 6.5/10. Published 2025-10-09.

How severe is CVE-2025-59980?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Juniper Junos

CVE-2025-59980

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.

EPSS: 0.003 (19.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Juniper Junos — versions 22.4, 23.2, 23.4
Juniper Networks Junos Os — versions 0, 23.2, 23.4

Weakness classification (CWE)

CWE-305 — Authentication Bypass by Primary Weakness

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-59980?: CVE-2025-59980 is a medium-severity vulnerability in Juniper Junos, classified under Authentication Bypass by Primary Weakness. CVSS score: 6.5/10. Published 2025-10-09.
How severe is CVE-2025-59980?: Medium severity. CVSS v3 base score is 6.5 out of 10.