CVE-2025-52946 Details
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).
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2025-52946
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.11 Probability of exploitation activity being observed over the next 30 days (29th percentile)
CVSS score for CVE-2025-52946
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2025-52946
Junos 24.2
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Not available
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CVE-2025-52946 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
NA 5 25.00%
ZM 4 20.00%
CN 2 10.00%
TW 2 10.00%
US 2 10.00%
VE 2 10.00%
KR 1 5.00%
NG 1 5.00%
VN 1 5.00%

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CVE-2025-52946 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 11 91.67%
Technology 1 8.33%

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