---
title: "CVE-2026-102069: Juniper Networks Junos OS - Buffer Overflow"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-102069/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102069)

## 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](https://cwe.mitre.org/data/definitions/121.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102069](https://nvd.nist.gov/vuln/detail/CVE-2026-102069)
- [https://supportportal.juniper.net/JSA112188](https://supportportal.juniper.net/JSA112188)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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