Medium 6.1Published Aug 28, 2026

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

Updated under an hour ago (Oct 26, 2026, 4:30 PM ET)

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It affects IGEL OS 12 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for IGEL OS 12

Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-636
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

IGEL IGEL OS 12 igel:os_12 (from the name)	from 12.0.0 through 12.8.2; 12.8.3 not affected; 12.9.0 not affected	CNA record
IGEL IGEL OS 11 igel:os_11 (from the name)	from 11.0.0 before 11.11.150	CNA record

References

References

https://kb.igel.com/en/security-safety/current/isn-2026-20-grub-shell-escape-in-igel-os	vendor-advisory, patch
https://blog.amberwolf.com/blog/2026/august/thin-client-thin-crypto-overview/	technical-description
https://media.defcon.org/DEF%20CON%2034/DEF%20CON%2034%20presentations/DEF%20CON%2034%20presentations/DEF%20CON%2034%20-%20Darren%20McDonald%20-%20Thin%20Client%20Thin%20Crypto%20-%20Bypassing%20Full-Desk%20Encryption%20Across%20Three%20Major%20Thin%20Clients%20Vendors%20without%20Breaking%20a%20Ci.pdf
https://www.vulncheck.com/advisories/igel-os-12-11-secure-boot-bypass-via-unsigned-igel-conf-file	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.