# CVE-2026-8169: ExtremeXOS Debug-Mode Privilege Escalation via Weak PRNG

> Attackers with low-privilege access or physical console access can predict debug-mode challenges to gain root privileges and modify the switch software stack.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jul 2026
- **Updated:** 20 Jul 2026
- **Also known as:** GHSA-mxjh-p6gq-89p9

## What is CVE-2026-8169?

CVE-2026-8169 is a high-severity vulnerability in Extreme Networks Switch Engine (EXOS), published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ExtremeXOS (EXOS) uses a challenge-response mechanism to authorize access to the privileged debug-mode function. The challenge value is generated using an insufficiently random source, which under certain conditions may allow an attacker to predict the expected response and activate debug-mode without authorization. Depending on device configuration and version, this may enable escalation to root-level access and persistent modification of the device software stack. Exploitation requires either a valid low-privilege account on the device (remote scenario) or physical serial console access (local scenario). This vulnerability is distinct from CVE-2017-14329, which addressed a different issue involving Python script privileges.

Extreme would like to thank Hadrien Barral (Université Gustave Eiffel) and Georges-Axel Jaloyan (French Ministry of the Interior) for responsible disclosure of their findings.

Weakness: CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG))

## Which versions are affected by CVE-2026-8169?


## How do I fix CVE-2026-8169?

No fix has been published for CVE-2026-8169 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8169 being exploited?

There is no known exploitation of CVE-2026-8169 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8169 and fix it if it is affected.

What it is: CVE-2026-8169 is a high-severity vulnerability in Extreme Networks Switch Engine (EXOS), published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-8169 in the wild and no public exploit code.

Affected product: Extreme Networks Switch Engine (EXOS). 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-2026-8169/ (Markdown: https://insights.sbomify.com/CVE-2026-8169/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8169
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8169
- OSV: https://osv.dev/vulnerability/CVE-2026-8169

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8169/
Summaries are generated and may contain mistakes; the official description above is the record.