# CVE-2025-52955

## Summary

- **CVE ID:** CVE-2025-52955
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/U:Green)
- **CWE:** CWE-131
- **Published:** Jul 11, 2025
- **Last Modified:** Mar 13, 2026

## Description

An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash. 











When
the logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart. 


Continued receipt of these specific updates will cause a sustained Denial of Service condition.


This issue affects Junos OS:

  *  All versions before 21.2R3-S9, 
  *  All versions of 21.4, 
  *  All versions of 22.2, 
  *  from 22.4 before 22.4R3-S7, 
  *  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 of 21.2-EVO, 
  *  All versions of 21.4-EVO, 
  *  All versions of 22.2-EVO, 
  *  from 22.4 before 22.4R3-S7-EVO, 
  *  from 23.2 before 23.2R2-S3-EVO, 
  *  from 23.4 before 23.4R2-S4-EVO, 
  *  from 24.2 before 24.2R2-EVO.

## Affected Products

- Juniper Networks — Junos OS (0)
- Juniper Networks — Junos OS (21.4)
- Juniper Networks — Junos OS (22.2)
- Juniper Networks — Junos OS (22.4)
- Juniper Networks — Junos OS (23.2)
- Juniper Networks — Junos OS (23.4)
- Juniper Networks — Junos OS (24.2)
- Juniper Networks — Junos OS Evolved (0)
- Juniper Networks — Junos OS Evolved (21.4)
- Juniper Networks — Junos OS Evolved (22.2)
- Juniper Networks — Junos OS Evolved (22.4)
- Juniper Networks — Junos OS Evolved (23.2)
- Juniper Networks — Junos OS Evolved (23.4)
- Juniper Networks — Junos OS Evolved (24.2)

## References

- [CNA](https://supportportal.juniper.net/JSA100062)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 18.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._