CVE-2026-33792 Junos OS: SRX Series: An attacker causes remote code execution and denial of service when a GRE tunnel is configured
An unauthenticated attacker can execute code as root or cause denial of service via crafted packets on configured GRE tunnels in Juniper SRX devices.
- 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-2026-33792?
CVE-2026-33792 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 srxpfe process of Juniper Networks Junos OS on SRX Series allows an unauthenticated network attacker to execute code as root or cause a denial of service via a crafted packet received on a configured GRE tunnel.
Weakness: CWE-121
Which versions are affected by CVE-2026-33792?
How do I fix CVE-2026-33792?
No fix has been published for CVE-2026-33792 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-2026-33792 being exploited?
There is no known exploitation of CVE-2026-33792 in the wild and no public exploit code.
Sources
Also known as GHSA-8g7f-8jqh-v9wr.