CVE-2025-59980

EUVD-2025-33387

09.10.2025, 17:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.5 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
juniper	CNA	6.5 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 18%

Affected Products (NVD)

Vendor	Product	Version
juniper	junos	𝑥 < 22.4
juniper	junos	22.4
juniper	junos	22.4:r1
juniper	junos	22.4:r1-s1
juniper	junos	22.4:r1-s2
juniper	junos	22.4:r2
juniper	junos	22.4:r2-s1
juniper	junos	22.4:r2-s2
juniper	junos	22.4:r3
juniper	junos	22.4:r3-s1
juniper	junos	22.4:r3-s2
juniper	junos	22.4:r3-s3
juniper	junos	22.4:r3-s4
juniper	junos	22.4:r3-s5
juniper	junos	22.4:r3-s6
juniper	junos	22.4:r3-s7
juniper	junos	23.2
juniper	junos	23.2:r1
juniper	junos	23.2:r1-s1
juniper	junos	23.2:r1-s2
juniper	junos	23.2:r2
juniper	junos	23.2:r2-s1
juniper	junos	23.2:r2-s2
juniper	junos	23.4
juniper	junos	23.4:r1
juniper	junos	23.4:r1-s1
juniper	junos	23.4:r1-s2

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-305 - Authentication Bypass by Primary Weakness
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

References

https://supportportal.juniper.net/JSA103167