Quick answers
- Is CVE-2026-73027 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73027 being exploited in the wild.
- How severe is CVE-2026-73027?
- High severity, with a CVSS score of 7.8, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows Setup Files Cleanup.
- Is there a fix for CVE-2026-73027?
- 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-2026-73027 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-73027?
- Check whether you run Microsoft Windows Setup Files Cleanup. 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
The vulnerability is an external control of system or configuration setting (CWE-15) in Windows Setup Files Cleanup that permits privilege escalation via local attack vector. An authorized attacker with local access can exploit this to elevate privileges; no network access or user interaction is required beyond initial authentication.
Affected products
- Microsoft Windows Setup Files Cleanup
Timeline
- 2026-10-13: disclosed