Exploited vulnerability · CISA KEV

Is CVE-2025-47827 exploited? Yes: in CISA KEV since 14 Oct 2025

Gociux · IGEL OS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-47827, IGEL OS Use of a Key Past its Expiration Date Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 14 Oct 2025, 131 days after it was published. It affects IGEL OS. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

IGEL OS contains a use of a key past its expiration date vulnerability that allows for Secure Boot bypass. The igel-flash-driver module improperly verifies a cryptographic signature. Ultimately, a crafted root filesystem can be mounted from an unverified SquashFS image.

What to do

1. Check whether you run it. Look for IGEL OS in your asset inventory, including appliances and cloud images. Stack check lists every exploited IGEL CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 5 Jun 2025.
4. Get told next time. Email alerts when CISA adds a CVE for IGEL.

References

• msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-47827
• nvd.nist.gov/vuln/detail/CVE-2025-47827

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in October 2025 · act-now radar.