CVE-2026-102069 Juniper Networks Junos OS - Buffer Overflow

Juniper Networks Junos OS on Junos Fusion Aggregation Devices contains a stack-based buffer overflow caused by dot1x daemon synchronization handling, letting adjacent ICCP peer attackers cause denial of service or execute code as root, exploit requires dot1x synchronization enabled in Fusion satellite topology.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to the latest Junos OS version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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