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CVE-2025-30661— Junos OS: Low-privileged user can cause script to run as root, leading to privilege escalation

Quick assessment

Affected
Juniper Networks Junos OS
Exploitation
Public or AI PoC available; prioritize validation
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存在安全漏洞，该漏洞源于线路卡脚本处理权限分配不当，可能导致权限提升。

CVSS 7.3 · High EPSS 0.17% · P6
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I. Basic Information for CVE-2025-30661

Vulnerability Information
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Vulnerability Title
Junos OS: Low-privileged user can cause script to run as root, leading to privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
An Incorrect Permission Assignment for Critical Resource vulnerability in line card script processing of Juniper Networks Junos OS allows a local, low-privileged user to install scripts to be executed as root, leading to privilege escalation. A local user with access to the local file system can copy a script to the router in a way that will be executed as root, as the system boots. Execution of the script as root can lead to privilege escalation, potentially providing the adversary complete control of the system. This issue only affects specific line cards, such as the MPC10, MPC11, LC4800, LC9600, MX304-LMIC16, SRX4700, and EX9200-15C. This issue affects Junos OS: * from 23.2 before 23.2R2-S4,  * from 23.4 before 23.4R2-S5,  * from 24.2 before 24.2R2-S1,  * from 24.4 before 24.4R1-S3, 24.4R2. This issue does not affect versions prior to 23.1R2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
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存在安全漏洞，该漏洞源于线路卡脚本处理权限分配不当，可能导致权限提升。
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 23.2 ~ 23.2R2-S4 -

II. Public POCs for CVE-2025-30661

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Qwen3.6-35B-A3B · 5627 chars
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III. Intelligence Information for CVE-2025-30661

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Vendor Advisories for CVE-2025-30661 (1)

Same Patch Batch · Juniper Networks · 2025-07-11 · 24 CVEs total

CVE-2025-52950 9.6 CRITICAL Juniper Security Director: Insufficient authorization for multiple endpoints in web interf
CVE-2025-52954 7.8 HIGH Junos OS Evolved: A low-privileged user can execute arbitrary Junos commands and modify th
CVE-2025-52946 7.5 HIGH Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH cau
CVE-2025-52981 7.5 HIGH Junos OS: SRX Series: Sequence of specific PIM packets causes a flowd crash
CVE-2025-52980 7.5 HIGH Junos OS: SRX300 Series: rpd will crash upon receiving a specific, valid BGP UPDATE messag
CVE-2025-52983 7.2 HIGH Junos OS: After removing ssh public key authentication root can still log in
CVE-2025-52988 6.7 MEDIUM Junos OS and Junos OS Evolved: Privilege escalation to root via CLI command 'request syste
CVE-2025-6549 6.5 MEDIUM Junos OS: SRX Series: J-Web can be exposed on additional interfaces
CVE-2025-52947 6.5 MEDIUM Junos OS: ACX Series: When 'hot-standby' mode is configured for an L2 circuit, interface f
CVE-2025-52949 6.5 MEDIUM Junos OS and Junos OS Evolved: In an EVPN environment, receipt of specifically malformed B
CVE-2025-52955 6.5 MEDIUM Junos OS and Junos OS Evolved: When jflow/sflow is configured continuous logical interface
CVE-2025-52952 6.5 MEDIUM Junos OS: MX Series with MPC-BUILTIN, MPC 1 through MPC 9: Receipt and processing of a mal
CVE-2025-52953 6.5 MEDIUM Junos OS and Junos OS Evolved: An unauthenticated adjacent attacker sending a valid BGP UP
CVE-2025-52964 6.5 MEDIUM Junos OS and Junos OS Evolved: Receipt of a specific BGP UPDATE causes an rpd crash on dev
CVE-2025-52982 5.9 MEDIUM Junos OS: MX Series: When specific SIP packets are processed the MS-MPC will crash
CVE-2025-52984 5.9 MEDIUM Junos OS and Junos OS Evolved: When a static route points to a reject next-hop and a gNMI
CVE-2025-52948 5.9 MEDIUM Junos OS: Specific unknown traffic pattern causes FPC and system to crash when packet capt
CVE-2025-52951 5.8 MEDIUM Junos OS: IPv6 firewall filter fails to match payload-protocol
CVE-2025-52963 5.5 MEDIUM Junos OS: A low-privileged user can disable an interface
CVE-2025-52986 5.5 MEDIUM Junos OS and Junos OS Evolved: When RIB sharding is configured each time a show command is

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-732

V. Comments for CVE-2025-30661

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