Junos OS (SRX firewalls)
CVE-2025-30655: A specific CLI command will cause an RPD crash when rib-sharding and update-threading is enabled
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to cause a Denial-of-Service (DoS).
Published
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 | 21.2R3-S9 or later |
| Junos OS 21.4 | 21.4R3-S8 or later |
| Junos OS 22.2 | 22.2R3-S6 or later |
| Junos OS 22.4 | 22.4R3-S2 or later |
| Junos OS 23.2 | 23.2R2-S3 or later |
| Junos OS 23.4 | 23.4R2 or later |
| Junos OS Evolved 0 | 21.2R3-S9-EVO or later |
| Junos OS Evolved 21.4-EVO | 21.4R3-S8-EVO or later |
| Junos OS Evolved 22.2-EVO | 22.2R3-S6-EVO or later |
| Junos OS Evolved 22.4-EVO | 22.4R3-S2-EVO or later |
| Junos OS Evolved 23.2-EVO | 23.2R2-S3-EVO or later |
| Junos OS Evolved 23.4-EVO | 23.4R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to cause a Denial-of-Service (DoS).
When a specific "show bgp neighbor" CLI command is run, the rpd cpu utilization rises and eventually causes a crash and restart. Repeated use of this command will cause a sustained DoS condition.
The device is only affected if BGP RIB sharding and update-threading is enabled. This issue affects Junos OS:
- All versions before 21.2R3-S9,
- from 21.4 before 21.4R3-S8,
- from 22.2 before 22.2R3-S6,
- from 22.4 before 22.4R3-S2,
- from 23.2 before 23.2R2-S3,
- from 23.4 before 23.4R2.
and Junos OS Evolved:
- All versions before 21.2R3-S9-EVO,
- from 21.4-EVO before 21.4R3-S8-EVO,
- from 22.2-EVO before 22.2R3-S6-EVO,
- from 22.4-EVO before 22.4R3-S2-EVO,
- from 23.2-EVO before 23.2R2-S3-EVO,
- from 23.4-EVO before 23.4R2-EVO.
Am I affected?
The following configuration is required on the device for it to be affected: [ system processes routing bgp rib-sharding ] [ system processes routing bgp update-threading ]
Workarounds
There are no known workarounds for this issue. Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.