Incorrect Initialization of Resource Vulnerability in Junos OS on Juniper Networks Devices
CVE-2026-33773

6.9MEDIUM

Key Information:

Vendor

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

Badges

👾 Exploit Exists

What is CVE-2026-33773?

An Incorrect Initialization of Resource vulnerability in the packet forwarding engine of Junos OS allows an unauthenticated network-based attacker to manipulate traffic handling on certain EX and QFX Series devices. When both family inet and inet6 filters are applied to an IRB and a physical interface as egress filters, conflicts can arise, leading to unintended traffic flowing through an interface that should be blocked. This flaw impacts versions 23.4R2-S6 and 24.2R2-S3 specifically.

Affected Version(s)

Junos OS EX Series 23.4R2-S6 < 23.4R2-S7

Junos OS EX Series 24.2R2-S3 < 24.2R2-S4

References

https://kb.juniper.net/JSA107815
vendor-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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