Quick answers
- Is CVE-2026-119903 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-119903 being exploited in the wild.
- How severe is CVE-2026-119903?
- High severity, with a CVSS score of 7.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows Installer.
- Is there a fix for CVE-2026-119903?
- 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-2026-119903 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-119903?
- Check whether you run Microsoft Windows Installer. 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 improper access control issue in Windows Installer that permits privilege escalation via local attack vector. An authorized attacker with user-level access can exploit this vulnerability to gain elevated (administrative) privileges on the system without requiring additional authentication or user interaction.
Affected products
- Microsoft Windows Installer
Timeline
- 2026-11-10: disclosed