What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-10-14
• EPSS: 4.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-05 · updated 2026-06-17
• Weakness: CWE-347

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.

Affected products

• Igel Os: before 11.01.100 — fixed in 11.01.100
• Microsoft Windows 10 Version 1507: before 10.0.10240.21161 — fixed in 10.0.10240.21161
• Microsoft Windows 10 1607: before 10.0.14393.8519 — fixed in 10.0.14393.8519
• Microsoft Windows 10: before 10.0.17763.7919 — fixed in 10.0.17763.7919
• Microsoft Windows 10: before 10.0.19044.6456 — fixed in 10.0.19044.6456
• Microsoft Windows 10: before 10.0.19045.6456 — fixed in 10.0.19045.6456
• Microsoft Windows 11: before 10.0.22621.6060 — fixed in 10.0.22621.6060
• Microsoft Windows 11: before 10.0.22631.6060 — fixed in 10.0.22631.6060
• Microsoft Windows 11: before 10.0.26100.6899 — fixed in 10.0.26100.6899
• Microsoft Windows 11 25H2: before 10.0.26200.6899 — fixed in 10.0.26200.6899
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: before 10.0.14393.8519 — fixed in 10.0.14393.8519
• Microsoft Windows Server 2019: before 10.0.17763.7919 — fixed in 10.0.17763.7919
• Microsoft Windows Server 2022: before 10.0.20348.4294 — fixed in 10.0.20348.4294
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1913 — fixed in 10.0.25398.1913
• Microsoft Windows Server 2025: before 10.0.26100.6899 — fixed in 10.0.26100.6899

How to fix

Upgrade to a fixed version: Igel Os 11.01.100; Microsoft Windows 10 Version 1507 10.0.10240.21161; Microsoft Windows 10 1607 10.0.14393.8519; Microsoft Windows 10 10.0.17763.7919; Microsoft Windows 10 10.0.19044.6456; Microsoft Windows 10 10.0.19045.6456; Microsoft Windows 11 10.0.22621.6060; Microsoft Windows 11 10.0.22631.6060; Microsoft Windows 11 10.0.26100.6899; Microsoft Windows 11 25H2 10.0.26200.6899; Microsoft Windows Server 2016 10.0.14393.8519; Microsoft Windows Server 2019 10.0.17763.7919. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2025-47827 or the next vulnerability affects your stack