Microsoft Install Service Elevation of Privilege Vulnerability
43Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.8epss 3.5%
from disclosure to weapon0 days
Published on NVDJul 14
1st PoCJun 3
exploitation probability
3.5%top 12% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Improper privilege management in Microsoft Install Service allows an authorized attacker to elevate privileges locally.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 1
githubgithub.com/Rat5ak/CVE-2026-50343-InstallService-EoP★ 48⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.