CVE-2025-47827

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 v3.1 Score

4.6

MEDIUM

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

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Oct 14, 2025 Remediation due: Nov 4, 2025

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
igel	igel_os	< 11.01.100
microsoft	windows_10_1507	< 10.0.10240.21161
microsoft	windows_10_1507	< 10.0.10240.21161
microsoft	windows_10_1607	< 10.0.14393.8519
microsoft	windows_10_1607	< 10.0.14393.8519
microsoft	windows_10_1809	< 10.0.17763.7919
microsoft	windows_10_1809	< 10.0.17763.7919
microsoft	windows_10_21h2	< 10.0.19044.6456
microsoft	windows_10_22h2	< 10.0.19045.6456
microsoft	windows_11_22h2	< 10.0.22621.6060
microsoft	windows_11_23h2	< 10.0.22631.6060
microsoft	windows_11_24h2	< 10.0.26100.6899
microsoft	windows_11_25h2	< 10.0.26200.6899
microsoft	windows_server_2012	All
microsoft	windows_server_2012	All
microsoft	windows_server_2016	< 10.0.14393.8519
microsoft	windows_server_2019	< 10.0.17763.7919
microsoft	windows_server_2022	< 10.0.20348.4294
microsoft	windows_server_2022_23h2	< 10.0.25398.1913
microsoft	windows_server_2025	< 10.0.26100.6899

References

Exploits

https://github.com/Zedeldi/CVE-2025-47827 https://github.com/Zedeldi/CVE-2025-47827

Other References

https://github.com/Zedeldi/igelfs https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47827

Frequently Asked Questions

What is CVE-2025-47827? +

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. It has a CVSS v3.1 base score of 4.6 (MEDIUM). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-47827? +

CVE-2025-47827 has a CVSS v3.1 score of 4.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-47827? +

CVE-2025-47827 affects products from igel, microsoft, specifically: igel_os, windows_10_1507, windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_22h2, windows_11_23h2, windows_11_24h2, windows_11_25h2, windows_server_2012, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2022_23h2, windows_server_2025. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-47827? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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