CVE-2026-33796 Junos OS and Junos OS Evolved: An attacker causes remote root command execution when BMP route monitoring is enabled
A stack-based buffer overflow in Junos OS allows remote root command execution when BMP route monitoring is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33796?
CVE-2026-33796 is a critical memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured external BGP neighbor to execute arbitrary commands with root privileges via BMP route monitoring.
Weakness: CWE-121
Which versions are affected by CVE-2026-33796?
How do I fix CVE-2026-33796?
No fix has been published for CVE-2026-33796 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-2026-33796 being exploited?
There is no known exploitation of CVE-2026-33796 in the wild and no public exploit code.
Sources
Also known as GHSA-fcqq-h8rj-r9h8.