# CVE-2025-30656

## Summary

- **CVE ID:** CVE-2025-30656
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M)
- **CWE:** CWE-167
- **Published:** Apr 9, 2025
- **Last Modified:** Mar 12, 2026

## Description

An Improper Handling of Additional Special Element vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MS-MPC, MS-MIC and SPC3, and SRX Series, allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

If the SIP ALG processes specifically formatted SIP invites, a memory corruption will occur which will lead to a crash of the FPC processing these packets. Although the system will automatically recover with the restart of the FPC, subsequent SIP invites will cause the crash again and lead to a sustained DoS.




This issue affects Junos OS on MX Series and SRX Series: 

  *  all versions before 21.2R3-S9,
  *  21.4 versions before 21.4R3-S10,
  *  22.2 versions before 22.2R3-S6,
  *  22.4 versions before 22.4R3-S5,
  *  23.2 versions before 23.2R2-S3,
  *  23.4 versions before 23.4R2-S3,
  *  24.2 versions before 24.2R1-S2, 24.2R2.

## 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)

## References

- [CNA](https://supportportal.juniper.net/JSA96466)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._