Improper Input Validation in Junos OS and Junos OS Evolved by Juniper Networks
CVE-2026-102047

7.1HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-102047?

An improper validation of consistency within input vulnerability exists in the l2cpd process of Junos OS and Junos OS Evolved. This flaw allows an unauthenticated Layer 2 attacker, positioned adjacent to the target network, to exploit the weaknesses of Layer 2 control protocols. By sending a specially crafted MVRP Ethernet frame to an MVRP-enabled interface, the attacker can lead to a denial of service, impacting the stability and availability of affected network services.

Affected Version(s)

Junos OS 0 < 23.2R2-S7.7

Junos OS 23.4 < 23.4R2-S8.13

Junos OS 24.2 < 24.2R2-S5.5

References

https://supportportal.juniper.net/JSA112187
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Adjacent 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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