---
title: "CVE-2026-40573: NovumOS - Privilege Escalation"
description: "NovumOS prior to 0.25-beta.1 contains a privilege escalation caused by the Nova interpreter running in Ring 0 without isolation, letting local users execute code with kernel privileges via malicious .nv scripts."
url: https://panop.io/threat-heartbeat/CVE-2026-40573/
---

# CVE-2026-40573 NovumOS - Privilege Escalation

NovumOS prior to 0.25-beta.1 contains a privilege escalation caused by the Nova interpreter running in Ring 0 without isolation, letting local users execute code with kernel privileges via malicious .nv scripts.

CVSS base score 8.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-40573)

## Details

Type

Privilege Escalation

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-250](https://cwe.mitre.org/data/definitions/250.html)

## Vendor fix

Update to version 0.25-beta.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-40573](https://nvd.nist.gov/vuln/detail/CVE-2026-40573)
- [https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207](https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207)
- [https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr](https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr)
- [https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1](https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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