IGEL OS Secure Boot bypass in Microsoft Windows



| Updated: 2025-11-07
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-47827
CWE-ID CWE-347
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper verification of cryptographic signature

EUVDB-ID: #VU117018

Risk: High

CVSSv4.0: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2025-47827

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: Yes

Description

The vulnerability allows an attacker to bypass implemented security restrictions.

The vulnerability exists due to improper verification of cryptographic signature when mounting a SquashFS image in IGEL OS firmware. An attacker with physical access to the system can bypass Secure Boot protection feature and compromise the affected system.

Note, the vulnerability is being actively exploited in the wild against the Windows users. 

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Windows: 10 21H2 10.0.19041.3920 - 11 24H2 10.0.26100.6584

Windows Server: 2012 6.2.9200.24768 - 2025 10.0.26100.6584

CPE2.3 External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-47827


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



###SIDEBAR###