Quick answers
- Is CVE-2026-48575 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-48575 being exploited in the wild.
- How severe is CVE-2026-48575?
- High severity, with a CVSS score of 7.9, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Windows Secure Boot.
- Is there a fix for CVE-2026-48575?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-48575 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-48575?
- Check whether you run Microsoft Windows Secure Boot. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is classified as a protection mechanism failure (CWE-693) within the Windows Secure Boot process. An attacker with local access and high privileges (Administrator or equivalent) can exploit this flaw to bypass Secure Boot integrity checks. The vulnerability has a CVSS score of 7.9, reflecting a high impact on system confidentiality and integrity due to the 'Changed' scope, which indicates the attacker can impact components outside the immediate security scope of the vulnerable software. This could lead to the execution of unsigned or malicious bootloaders. Microsoft has released information regarding this vulnerability via their Security Update Guide.
Affected products
- Microsoft Windows Secure Boot
Timeline
- 2026-06-09: disclosed: Vulnerability published by Microsoft and NVD.