# 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.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-8g7f-8jqh-v9wr

## 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 (Stack-based Buffer Overflow)

## 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.

## Is CVE-2026-33792 being exploited?

There is no known exploitation of CVE-2026-33792 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33792 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-33792 in the wild and no public exploit code.

Affected product: Juniper Networks Junos OS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-33792/ (Markdown: https://insights.sbomify.com/CVE-2026-33792/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33792
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33792
- OSV: https://osv.dev/vulnerability/CVE-2026-33792

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-33792/
Summaries are generated and may contain mistakes; the official description above is the record.