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

Medium severity, CVSS 4.6. Actively exploited: in CISA KEV since 2025-10-14. EPSS: 4.9% chance of exploitation in the next 30 days.

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 IGEL OS: before 11.01.100 (fixed in 11.01.100)
• Microsoft Windows 10 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 1809: before 10.0.17763.7919 (fixed in 10.0.17763.7919)
• Microsoft Windows 10 21h2: before 10.0.19044.6456 (fixed in 10.0.19044.6456)
• Microsoft Windows 10 22h2: before 10.0.19045.6456 (fixed in 10.0.19045.6456)
• Microsoft Windows 11 22h2: before 10.0.22621.6060 (fixed in 10.0.22621.6060)
• Microsoft Windows 11 23h2: before 10.0.22631.6060 (fixed in 10.0.22631.6060)
• Microsoft Windows 11 24h2: 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: affected versions not specified; version r2 only
• 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: 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)

Published 2025-06-05. Last modified 2026-06-17.