8.1High
Microsoft Windows Server 2008
CVE-2022-37966
Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability
What this means for your business
- It affects Microsoft Windows Server 2008. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 3% chance of attack attempts being seen in the next 30 days, ranking above 83% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Microsoft Windows Server 2008, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 8.1 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Assigned by
- secure@microsoft.com
Dates
- Published
- 2022-11-09
- Last modified
- 2026-08-10
- Sources
- NVD
Affected products
- Microsoft Windows Server 2008all versions, r2
- Microsoft Windows Server 2012all versions, r2
- Microsoft Windows Server 2016all versions
- Microsoft Windows Server 2019all versions
- Microsoft Windows Server 2022all versions
- Fedoraproject Fedora36, 37
- Netapp Management Services For Element Softwareall versions
- Netapp Management Services For Netapp Hciall versions
- Samba Samba- 4.15.13, 4.16.0 - 4.16.8, 4.17.0 - 4.17.4
As listed in the NVD configuration data. Not a statement about your estate.