Reachable Assertion Vulnerability in Juniper Networks Junos OS
CVE-2026-102035

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-2026-102035?

A Reachable Assertion vulnerability in the l2ald process of Juniper Networks' Junos OS enables adjacent attackers to cause a denial of service. This is achieved through carefully crafted ICCP peer messages when MC-LAG IRB MAC synchronization is active, potentially disrupting normal operations and impacting network availability. Administrators should ensure their systems are updated to mitigate this risk.

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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