CVE-2025-47827
IGEL OS Use of a Key Past its Expiration Date Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 November 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 4.6 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.93% probability · 92th percentile
- CISA KEV
- Listed 14 October 2025 · due 4 November 2025
- Weakness
- CWE-347
- Affected
- igel/igel os · microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows 11 25h2 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2 · microsoft/windows server 2025
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827 ; https://nvd.nist.gov/vuln/detail/CVE-2025-47827
References
- https://github.com/Zedeldi/CVE-2025-47827Exploit, Third Party Advisory
- https://github.com/Zedeldi/igelfsProduct
- https://github.com/Zedeldi/CVE-2025-47827Exploit, Third Party Advisory
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47827US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.