Vulnerability · Published Oct 14, 2026 · Assigned by juniper

CVE-2026-102069Junos OS: An ICCP peer causes dot1xd to crash when dot1x synchronization is enabled

High 8.8

In plain English

A high-severity stack buffer overflow in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 71.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Juniper Networks	Junos OS	0 – before 23.2R2-S7.723.4 – before 23.4R2-S8.1324.2 – before 24.2R2-S5.524.4 – before 24.4R2-S525.2 – before 25.2R2-S225.4 – before 25.4R1-S326.2 – before 26.2R1-S2

Weakness: CWE-121 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://supportportal.juniper.net/JSA112188 vendor-advisory