CVE-2026-102069: CWE-121 Stack-based Buffer Overflow in Juniper Networks Junos OS
Description
A Stack-based Buffer Overflow vulnerability in the dot1x daemon of Juniper Networks Junos OS devices operating as Junos Fusion Aggregation Devices allows an adjacent attacker acting as the configured ICCP peer to cause a denial of service and potentially execute code as root via. The issue is triggered when dot1x synchronization is enabled for the required Fusion satellite topology.
CVSS v3.1
Score 8.8high
Affected software
Juniper Networks
Junos OS
pkg:rpm/juniper/junos-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a stack-based buffer overflow in the dot1x daemon of Juniper Networks Junos OS devices operating as Junos Fusion Aggregation Devices. The flaw can be exploited by an adjacent attacker who is the configured ICCP peer, specifically when dot1x synchronization is enabled for the required Fusion satellite topology. Exploitation can lead to denial of service and potentially arbitrary code execution with root privileges. The CVSS v3.1 score is 8.8, reflecting high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with adjacency and configured as the ICCP peer can cause denial of service and potentially execute arbitrary code as root on affected Junos OS devices. This compromises system availability and control, posing a critical risk to network infrastructure relying on Junos Fusion Aggregation Devices with dot1x synchronization enabled.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or workaround information is provided in the available data. Until a fix is available, restrict adjacency and ICCP peer configurations to trusted entities and consider disabling dot1x synchronization for Fusion satellite topology if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T17:35:40.524Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfaf342cdf04f65694d38e
Added to database: 10/14/2026, 16:35:00 UTC
Last enriched: 10/14/2026, 16:49:36 UTC
Last updated: 10/15/2026, 00:48:14 UTC
Views: 9
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