CVE-2026-102047 Junos OS and Junos OS Evolved: An attacker causes l2cpd denial of service when MVRP is used
An adjacent attacker can cause a denial of service in Layer 2 control protocols by sending crafted MVRP frames to enabled interfaces.
- 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-2026-102047?
CVE-2026-102047 is a high-severity denial of service 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
An Improper Validation of Consistency within Input vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated Layer 2 attacker to cause a denial of service in associated Layer 2 control protocols via a crafted MVRP Ethernet frame sent to an MVRP-enabled interface.
Weakness: CWE-1288
Which versions are affected by CVE-2026-102047?
How do I fix CVE-2026-102047?
No fix has been published for CVE-2026-102047 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-102047 being exploited?
There is no known exploitation of CVE-2026-102047 in the wild and no public exploit code.
Sources
Also known as GHSA-w88x-j48x-p6wf.