Vulnerability · Published Oct 13, 2021 · Assigned by microsoft
CVE-2021-40456Windows AD FS Security Feature Bypass Vulnerability
Medium 5.3
In plain English
A medium-severity incorrect authorization in Windows Server 2019 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 84% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)2.3%top 16.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Windows AD FS Security Feature Bypass Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Server 2019 | 10.0.0 – before 10.0.17763.2237 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – before 10.0.17763.2237 |
| Microsoft | Windows Server 2022 | 10.0.0 – before 10.0.20348.288 |
| Microsoft | Windows Server version 2004 | 10.0.0 – before 10.0.19041.1288 |
| Microsoft | Windows Server version 20H2 | 10.0.0 – before 10.0.19042.1288 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C