CVE-2025-52958: When route validation is enabled, BGP connection establishment failure causes RPD crash

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during BGP initial session establishment can lead to an rpd crash and restart.

Published 9 Jul 2025

Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.

Affected and fixed versions

Product / branch	Fixed in
Junos OS 0	22.2R3-S6 or later
Junos OS 22.4	22.4R3-S6 or later
Junos OS 23.2	23.2R2-S3 or later
Junos OS 23.4	23.4R2-S4 or later
Junos OS 24.2	24.2R2 or later
Junos OS Evolved 0	22.2R3-S6-EVO or later
Junos OS Evolved 22.4	22.4R3-S6-EVO or later
Junos OS Evolved 23.2	23.2R2-S3-EVO or later
Junos OS Evolved 23.4	23.4R2-S4-EVO or later
Junos OS Evolved 24.2	24.2R2-EVO or later

Always confirm against the vendor advisory, which lists every fixed hotfix.

What it is

Continued session establishment failures leads to a sustained DoS condition.

This issue affects Junos OS:

All versions before 22.2R3-S6,
from 22.4 before 22.4R3-S6,
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 22.2R3-S6-EVO, * from 22.4 before 22.4R3-S6-EVO, * from 23.2 before 23.2R2-S3-EVO, * from 23.4 before 23.4R2-S4-EVO, * from 24.2 before 24.2R2-EVO.

Am I affected?

The following minimal configuration is required:

[protocols bgp] [routing-options validation]

Workarounds

There are no known workarounds for this issue.

Exploitation

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.