Juniper: >> Srx5k-Spc3 Security Vulnerabilities
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
When an affected device initiates a TCP connection to an attacker-controlled system that responds with a specific packet, this causes a PFE crash and restart, which affects all services until the system has automatically recovered.
This issue can happen among others in the following scenarios: ALG, SSL proxy, UTM, RTLOG, AppQoE probing, AAMW, ICAP, URL filtering.
This issue affects Junos OS on MX Series with SPC3, SRX5k Series with SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series, and vSRX Series:
* all versions before 23.2R2-S4,
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2.
CVSS Score
8.2
EPSS Score
0.003
Published
2026-07-09
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on
SRX1600, SRX2300, SRX 4000 Series, and SRX5000 Series with SPC3
allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If a sequence of specific PIM packets is received, this will cause a flowd crash and restart.
This issue affects Junos OS:
* all versions before 21.2R3-S9,
* 21.4 versions before 21.4R3-S11,
* 22.2 versions before 22.2R3-S7,
* 22.4 versions before 22.4R3-S6,
* 23.2 versions before 23.2R2-S4,
* 23.4 versions before 23.4R2-S4,
* 24.2 versions before 24.2R2.
This is a similar, but different vulnerability than the issue reported as
CVE-2024-47503, published in JSA88133.
CVSS Score
8.7
EPSS Score
0.004
Published
2025-07-11