CVE-2025-59957— Junos OS: EX4600 Series and QFX5000 Series: An attacker with physical access can open a persistent backdoor
Quick assessment
Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS on EX4600 Series和QFX5000 Series 21.4R3之前版本和22.2版本22.2R3-S3之前版本存在访问控制错误漏洞，该漏洞源于文件保护不足，可能导致攻击者通过物理访问创建后门并完全控制系统。
Possible ATT&CK Techniques 3 AI
T1053.003 · Cron T1098.004 · SSH Authorized Keys T1505.003 · Web Shell
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I. Basic Information for CVE-2025-59957
Vulnerability Information
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Vulnerability Title
Junos OS: EX4600 Series and QFX5000 Series: An attacker with physical access can open a persistent backdoor
Source: CVE Program / CVE List V5
Vulnerability Description
An Origin Validation Error vulnerability in an insufficient protected file of Juniper Networks Junos OS on EX4600 Series and QFX5000 Series allows an unauthenticated attacker with physical access to the device to create a backdoor which allows complete control of the system.
When a device isn't configured with a root password, an attacker can modify a specific file. It's contents will be added to the Junos configuration of the device without being visible. This allows for the addition of any configuration unknown
to the actual operator, which includes users, IP addresses and other configuration which could allow unauthorized access to the device.
This exploit is persistent across reboots and even zeroization.
The indicator of compromise is a modified /etc/config/<platform>-defaults[-flex].conf file. Review that file for unexpected configuration statements, or compare it to an unmodified version which can be extracted from the original Juniper software image file. For details on the extraction procedure please contact Juniper Technical Assistance Center (JTAC).
To restore the device to a trusted initial configuration the system needs to be reinstalled from physical media.
This issue affects Junos OS on EX4600 Series and QFX5000 Series:
* All versions before 21.4R3,
* 22.2 versions before 22.2R3-S3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS on EX4600 Series和QFX5000 Series 21.4R3之前版本和22.2版本22.2R3-S3之前版本存在访问控制错误漏洞，该漏洞源于文件保护不足，可能导致攻击者通过物理访问创建后门并完全控制系统。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 0 ~ 21.4R3 | - |
|
II. Public POCs for CVE-2025-59957
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Juniper Networks · 2025-10-09 · 40 CVEs total
| CVE-2025-59978 | 9.0 CRITICAL | Junos Space: Stored cross-site scripting vulnerability in web application |
| CVE-2025-59968 | 8.6 HIGH | Junos Space Security Director: Insufficient authorization for sensitive resources in web i |
| CVE-2025-59974 | 8.4 HIGH | Junos Space Security Director: Persistent Cross-Site Scripting (XSS) vulnerability |
| CVE-2025-59975 | 7.5 HIGH | Junos Space: Flooding device with inbound API calls leads to WebUI and CLI management acce |
| CVE-2025-60004 | 7.5 HIGH | Junos OS and Junos OS Evolved: Specific BGP EVPN update message causes rpd crash |
| CVE-2025-59964 | 7.5 HIGH | Junos OS: SRX4700: When forwarding-options sampling is enabled any traffic destined to the |
| CVE-2025-11198 | 7.4 HIGH | Security Director Policy Enforcer: An unrestricted API allows a network-based unauthentica |
| CVE-2025-59967 | 6.5 MEDIUM | Junos OS Evolved: ACX7024, ACX7024X, ACX7100-32C, ACX7100-48L, ACX7348, ACX7509: When spe |
| CVE-2025-59958 | 6.5 MEDIUM | Junos OS Evolved: PTX Series: When a firewall filter rejects traffic these packets are err |
| CVE-2025-52961 | 6.5 MEDIUM | Junos OS Evolved: PTX Series except PTX10003: An unauthenticated adjacent attacker sending |
| CVE-2025-59976 | 6.5 MEDIUM | Junos Space: Arbitrary file download vulnerability in web interface |
| CVE-2025-59980 | 6.5 MEDIUM | Junos OS: When a user with the name ftp or anonymous is configured unauthenticated filesys |
| CVE-2025-59987 | 6.1 MEDIUM | Junos Space: The arbitrary device search field is vulnerable to reflected cross-site scrip |
| CVE-2025-59981 | 6.1 MEDIUM | Junos Space: Device Template Definition page is vulnerable to reflected cross-site script |
| CVE-2025-59982 | 6.1 MEDIUM | Junos Space: Dashboard Search field is vulnerable to reflected cross-site script injection |
| CVE-2025-59983 | 6.1 MEDIUM | Junos Space: Template Definition page is vulnerable to reflected cross-site script injecti |
| CVE-2025-59984 | 6.1 MEDIUM | Junos Space: Global Search is vulnerable to reflected cross-site script injection |
| CVE-2025-59985 | 6.1 MEDIUM | Junos Space: Purging Policy field is vulnerable to reflected cross-site script injection |
| CVE-2025-59986 | 6.1 MEDIUM | Junos Space: Input fields in Model Devices are vulnerable to reflected cross-site script i |
| CVE-2025-59997 | 6.1 MEDIUM | Junos Space: Fields in the CLI Configlets are vulnerable to reflected cross-site script in |
Showing top 20 of 40 CVEs. View all on vendor page → →
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V. Comments for CVE-2025-59957
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