# CVE-2025-30660

## Summary

- **CVE ID:** CVE-2025-30660
- **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/RE:M)
- **CWE:** CWE-754
- **Published:** Apr 9, 2025
- **Last Modified:** Mar 12, 2026

## Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. 



When this issue occurs the following logs can be observed:

 <fpc #> MQSS(0): LI-3: Received a parcel with more than 512B accompanying data 
CHASSISD_FPC_ASIC_ERROR: ASIC Error detected <...>


This issue affects Junos OS:

  *  all versions before 21.2R3-S9,
  *  21.4 versions before 21.4R3-S8,
  *  22.2 versions before 22.2R3-S4,
  *  22.4 versions before 22.4R3-S5,
  *  23.2 versions before 23.2R2-S2,
  *  23.4 versions before 23.4R2.

## 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)

## References

- [CNA](https://supportportal.juniper.net/JSA96471)

## Exploitation Prediction (EPSS)

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

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