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CVE-2025-52946— Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH causes RPD crash

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和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是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 Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network

CVSS 7.5 · High EPSS 0.44% · P36
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I. Basic Information for CVE-2025-52946

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH causes RPD crash
Source: CVE Program / CVE List V5
Vulnerability Description
A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition. On all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled. This issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established. Systems without BGP traceoptions enabled are not impacted by this issue. This issue affects:  Junos OS: * All versions before 21.2R3-S9,  * all versions of 21.4, * from 22.2 before 22.2R3-S6,  * from 22.4 before 22.4R3-S5,  * from 23.2 before 23.2R2-S3,  * from 23.4 before 23.4R2-S4,  * from 24.2 before 24.2R2;  Junos OS Evolved:  * All versions before 22.4R3-S5-EVO,  * from 23.2-EVO before 23.2R2-S3-EVO,  * from 23.4-EVO before 23.4R2-S4-EVO,  * from 24.2-EVO before 24.2R2-EVO. This is a more complete fix for previously published CVE-2024-39549 (JSA83011).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是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 Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network
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 ~ 21.2R3-S9 -
Juniper Networks Junos OS Evolved 0 ~ 22.4R3-S5-EVO -

II. Public POCs for CVE-2025-52946

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III. Intelligence Information for CVE-2025-52946

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Vendor Advisories for CVE-2025-52946 (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-2025-52981 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-2025-30661 7.3 HIGH Junos OS: Low-privileged user can cause script to run as root, leading to privilege escala
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-416

V. Comments for CVE-2025-52946

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