CVE-2026-102050 Junos OS and Junos OS Evolved: An adjacent attacker causes Layer 2 control-plane denial of service when LLDP is enabled
An adjacent attacker can cause a Layer 2 control-plane denial of service by sending malicious LLDP packets to Juniper devices with LLDP enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102050?
CVE-2026-102050 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the l2cpd daemon of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a denial of service in Layer 2 control-plane processing via LLDP packets received on an interface configured for LLDP. Repeated triggering may disrupt LLDP and other Layer 2 control protocols across the device.
Weakness: CWE-121
Which versions are affected by CVE-2026-102050?
How do I fix CVE-2026-102050?
No fix has been published for CVE-2026-102050 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-102050 being exploited?
There is no known exploitation of CVE-2026-102050 in the wild and no public exploit code.
Sources
Also known as GHSA-j797-mpgh-r6v2.