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CVE-2026-82018— IGEL OS 12 / 11 Secure Boot Bypass via Unsigned igel.conf File

Quick assessment

Affected
IGEL IGEL OS 12
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IGEL OS是德国IGEL公司的一款终端操作系统。 IGEL OS 12.9.0之前版本和IGEL OS 11.11.150之前版本存在异常处理不当漏洞，该漏洞源于GRUB引导阶段存在安全启动绕过问题，物理攻击者可通过在分区中放置未签名的空文件igel.conf，利用GRUB的fail-open签名验证行为进入交互式GRUB提示符，引导设备内核并附加额外命令行参数，从而获得未授权的root权限。

CVSS 6.1 · Medium EPSS 0.25% · P17

Affected Version Matrix 4

VendorProduct Version RangeStatus
IGEL IGEL OS 11 11.0.0< 11.11.150 affected
IGEL IGEL OS 12 12.0.0≤ 12.8.2 affected
12.8.3 unaffected
12.9.0 unaffected
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I. Basic Information for CVE-2026-82018

Vulnerability Information
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Vulnerability Title
IGEL OS 12 / 11 Secure Boot Bypass via Unsigned igel.conf File
Source: CVE Program / CVE List V5
Vulnerability Description
IGEL OS 12 before 12.9.0, 12.8.3 LTS and IGEL OS 11 before 11.11.150 contain a secure boot bypass vulnerability in the GRUB boot stage that allows physically present attackers to gain unauthorized root access by placing an unsigned empty file named igel.conf on a partition. Attackers can exploit GRUB's fail-open signature verification behavior to drop into an interactive GRUB prompt, then boot the device's own kernel with additional command-line arguments to obtain a root shell with the disk unlocked while leaving TPM PCR values unaltered.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未能安全地进行程序失效(Failing Open)
Source: CVE Program / CVE List V5
Vulnerability Title
IGEL OS 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IGEL OS是德国IGEL公司的一款终端操作系统。 IGEL OS 12.9.0之前版本和IGEL OS 11.11.150之前版本存在异常处理不当漏洞，该漏洞源于GRUB引导阶段存在安全启动绕过问题，物理攻击者可通过在分区中放置未签名的空文件igel.conf，利用GRUB的fail-open签名验证行为进入交互式GRUB提示符，引导设备内核并附加额外命令行参数，从而获得未授权的root权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IGEL IGEL OS 12 12.0.0 ~ 12.8.2 -
IGEL IGEL OS 11 11.0.0 ~ 11.11.150 -

II. Public POCs for CVE-2026-82018

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III. Intelligence Information for CVE-2026-82018

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Vendor Advisories for CVE-2026-82018 (2)

Security Blog Posts for CVE-2026-82018 (1)

Other References for CVE-2026-82018 (1)

IV. Related Vulnerabilities

Same product: IGEL OS 12
Same vendor: IGEL
Same weakness: CWE-636