---
title: "CVE-2025-47827: IGEL OS Use of a Key Past its Expiration Date Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-47827/
description: "CVE-2025-47827 (IGEL IGEL OS): Exploited in the wild (CISA KEV). In IGEL OS before 11, Secure Boot can be bypassed because the igel-flash-driver module…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-06-05
date_modified: 2026-02-26
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-47827"
kev: true
cvss: 4.6
epss: 0.04927
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-47827: IGEL OS Use of a Key Past its Expiration Date Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run IGEL IGEL OS. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-10-14, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-11-04 ; treat that as the outer limit, not the target.
- EPSS 4.9% , percentile 92: FIRST’s model estimates a 4.9% chance of exploitation activity in the next 30 days, higher than 92% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs physical access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

In IGEL OS before 11, Secure Boot can be bypassed because the igel-flash-driver module improperly verifies a cryptographic signature. Ultimately, a crafted root filesystem can be mounted from an unverified SquashFS image.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 4.6 `CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

## Exploitation

- CISA KEV: added 2025-10-14; federal due date 2025-11-04. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 4.93% probability of exploitation activity in the next 30 days; percentile 92.

## Sources

- [msrc.microsoft.com](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827)
- [CVE.org record CVE-2025-47827](https://www.cve.org/CVERecord?id=CVE-2025-47827)
- [NVD entry CVE-2025-47827](https://nvd.nist.gov/vuln/detail/CVE-2025-47827)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47827)
- [github.com](https://github.com/Zedeldi/igelfs)
- [github.com](https://github.com/Zedeldi/CVE-2025-47827)

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Source page: https://erroneo.us/security/cve/CVE-2025-47827/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt