Description
Weak authentication in Windows Modern Device Management (MDM) allows an authorized attacker to perform tampering locally.
Affected products
microsoft: windows 10 1809; microsoft: windows server 2019
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83657 Vendor Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 20 · as of 11 November 2026
- CWE
- CWE-1390
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.