Improper Input Validation in Junos OS from Juniper Networks
CVE-2026-102033

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-2026-102033?

An improper validation issue in the l2ald component of Juniper Networks' Junos OS and Junos OS Evolved can be exploited by an adjacent attacker. By sending a specially crafted ICCP MC-LAG message, the attacker may trigger a denial of service condition, impacting the availability of the affected systems. This vulnerability underscores the importance of ensuring strict input validation processes to maintain system integrity and operational reliability.

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

.