CVE-2026-101969 Junos OS and Junos OS Evolved: An unauthenticated attacker causes rpd denial of service when IPv6 PIM is enabled
An unauthenticated attacker can cause a denial of service in Junos OS by sending malformed PIM Hello messages when IPv6 PIM is 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-2026-101969?
CVE-2026-101969 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 Input Validation vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a denial of service via a malformed PIM Hello message received on an IPv6-enabled PIM interface.
Weakness: CWE-20
Which versions are affected by CVE-2026-101969?
How do I fix CVE-2026-101969?
No fix has been published for CVE-2026-101969 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-2026-101969 being exploited?
There is no known exploitation of CVE-2026-101969 in the wild and no public exploit code.
Sources
Also known as GHSA-75wv-7fq3-rpgq.