# CVE-2026-76412: Cisco Secure Firewall Management Center Software Authenticated Privilege Escalation to Root Vulnerability

> An authenticated attacker can exploit a remote diagnostics debugger flaw to elevate privileges to root on Cisco Secure Firewall Management Center.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **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:** 16 Sep 2026
- **Updated:** 17 Sep 2026
- **Also known as:** GHSA-cxq7-wwr3-xj8v

## What is CVE-2026-76412?

CVE-2026-76412 is a high-severity vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the remote diagnostics debugger of Cisco Secure FMC Software could allow an authenticated, remote attacker to enable the remote diagnostics debugger service.

This vulnerability is due to an error when checking the privilege level of a user who is invoking remote diagnostics. An attacker could exploit this vulnerability by authenticating to the device, either through the web-based management interface or the REST API, and using the remote diagnostics debugger to grant a user elevated privileges. A successful exploit could allow the attacker to elevate privileges to root.
Notes:

To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
The CVSSv3.1 Attack Complexity is High due to the multistage process required to fully exploit this vulnerability.

Weakness: CWE-264

## Which versions are affected by CVE-2026-76412?


## How do I fix CVE-2026-76412?

No fix has been published for CVE-2026-76412 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76412 being exploited?

There is no known exploitation of CVE-2026-76412 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76412 and fix it if it is affected.

What it is: CVE-2026-76412 is a high-severity vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 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-2026-76412 in the wild and no public exploit code.

Affected product: Cisco Secure Firewall Management Center (FMC). 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-2026-76412/ (Markdown: https://insights.sbomify.com/CVE-2026-76412/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76412
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76412
- OSV: https://osv.dev/vulnerability/CVE-2026-76412

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76412/
Summaries are generated and may contain mistakes; the official description above is the record.