Improper Condition Check in Juniper Networks Junos OS Affects MX and SRX Series
CVE-2026-57022

8.2HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Vendor
CVE Published:
9 July 2026

Badges

👾 Exploit Exists

What is CVE-2026-57022?

A vulnerability exists in the Packet Forwarding Engine (PFE) of Juniper Networks' Junos OS, affecting multiple series including MX and SRX models. An unauthenticated attacker could exploit this flaw through a specifically crafted TCP connection, leading to a PFE crash and subsequent service disruptions until the device recovers automatically. This vulnerability can disrupt various services, including ALG, SSL proxy, UTM, and URL filtering, highlighting a significant risk in affected network infrastructures.

Affected Version(s)

Junos OS MX Series with SPC3 0 < 23.2R2-S4

Junos OS MX Series with SPC3 23.4 < 23.4R2-S5

Junos OS MX Series with SPC3 24.2 < 24.2R2

References

https://supportportal.juniper.net/JSA110082
vendor-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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