CVE-2025-59980Network attack vector

Unauthenticated file access via special FTP usernames

Published Oct 9, 2025 · Updated Oct 9, 2025

Authentication bypass in Juniper Networks Junos OS allows remote attackers to read and write files through the device's FTP server. The FTP authentication path treats accounts named "ftp" or "anonymous" as passwordless and grants access to the account's home directory despite a configured password. Exploitation requires the FTP service to be enabled and one of those usernames to exist; access is limited to reading and writing files in that home directory.

CVSS severity6.9
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Juniper Networks Junos OS allows remote attackers to read and write files through the device's FTP server. The FTP authentication path treats accounts named "ftp" or "anonymous" as passwordless and grants access to the account's home directory despite a configured password. Exploitation requires the FTP service to be enabled and one of those usernames to exist; access is limited to reading and writing files in that home directory.

The record

CVE
CVE-2025-59980
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-305, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <22.4R3-S8
  2. Affected versionversion=23.2 <23.2R2-S3
  3. Affected versionversion=23.4 <23.4R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <22.4R3-S8; version=23.2 <23.2R2-S3; version=23.4 <23.4R2

Published CVSS scores

6.9Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
6.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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