# CVE-2026-32291: GL-iNet Comet (GL-RM1) KVM unauthenticated root access via UART serial console

> An attacker with physical access can gain unauthenticated root privileges via the UART serial console on GL-iNet Comet KVM devices.

- **Severity:** High 7.0 (`CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2026
- **Updated:** 23 Mar 2026
- **Also known as:** GHSA-ffq4-j9j8-23g6

## What is CVE-2026-32291?

CVE-2026-32291 is a high-severity authentication bypass vulnerability in GL-iNet Comet KVM, published on 17 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console. This attack requires physically opening the device and connecting to the UART pins.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-32291?

It affects 1 product.


Products: Gl-Inet Comet Gl-Rm1 Firmware.

## How do I fix CVE-2026-32291?

No fix has been published for CVE-2026-32291 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-32291 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32291 exists.

## Other vulnerabilities in GL-iNet Comet KVM

- [CVE-2026-32292](https://insights.sbomify.com/CVE-2026-32292/): GL-iNet Comet (GL-RM1) KVM insufficient login rate-limiting (critical 9.3)
- [CVE-2026-32290](https://insights.sbomify.com/CVE-2026-32290/): GL-iNet Comet (GL-RM1) KVM insufficient firmware verification (high 7.0)
- [CVE-2026-32293](https://insights.sbomify.com/CVE-2026-32293/): GL-iNet Comet (GL-RM1) KVM insufficient certificate validation (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-32291 and fix it if it is affected.

What it is: CVE-2026-32291 is a high-severity authentication bypass vulnerability in GL-iNet Comet KVM, published on 17 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32291 exists.

Affected product: GL-iNet Comet KVM. 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-2026-32291/ (Markdown: https://insights.sbomify.com/CVE-2026-32291/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-32291
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-32291
- OSV: https://osv.dev/vulnerability/CVE-2026-32291

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-32291/
Summaries are generated and may contain mistakes; the official description above is the record.