Junos OS (SRX firewalls)
CVE-2025-30652: Executing a specific CLI command when asregex-optimized is configured causes an rpd crash
An Improper Handling of Exceptional Conditions vulnerability in routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker executing a CLI command 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-S10 or later |
| Junos OS 22.2 | 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 | 21.2R3-S9-EVO or later |
| Junos OS Evolved 21.4-EVO | 21.4R3-S10-EVO or later |
| Junos OS Evolved 22.2-EVO | 22.2R3-S6-EVO or later |
| Junos OS Evolved 22.4-EVO | 22.4R3-S6-EVO or later |
| Junos OS Evolved 23.2-EVO | 23.2R2-S3-EVO or later |
| Junos OS Evolved 23.4-EVO | 23.4R2-S4-EVO or later |
| Junos OS Evolved 24.2-EVO | 24.2R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Improper Handling of Exceptional Conditions vulnerability in routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker executing a CLI command to cause a Denial of Service (DoS).
When asregex-optimized is configured and a specific "show route as-path" CLI command is executed, the rpd crashes and restarts. Repeated execution of this command will cause a sustained DoS condition. This issue affects Junos OS:
- All versions before 21.2R3-S9,
- from 21.4 before 21.4R3-S10,
- from 22.2 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.
and Junos OS Evolved: * All versions before 21.2R3-S9-EVO, * from 21.4-EVO before 21.4R3-S10-EVO, * from 22.2-EVO before 22.2R3-S6-EVO, * from 22.4-EVO before 22.4R3-S6-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.
Am I affected?
Required configuration for exposure: [ edit policy-options defaults ] [ asregex-optimize optimize ]
Workarounds
Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.
Utilize CLI authorization to disallow execution of the 'show route as-path' command.
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.