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.
CVSS Metrics
- Vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:X
- Attack Vector
- network
- Complexity
- low
- Privileges
- none
- User Action
- none
- Confidentiality
- undefined
- Integrity
- undefined
- Availability
- undefined
- Weaknesses
- CWE-305
Metadata
- Primary Vendor
- JUNIPER
- Published
- 10/9/2025
- Last Modified
- 1/23/2026
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
juniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junosjuniper : junos
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