Exploited· due 2021-11-177.5highHighused in ransomware
CVE-2021-36942
Microsoft Windows Server 2004
Windows LSA Spoofing Vulnerability
Exploitation status
- CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
- It is known to have been used in ransomware campaigns.
- US federal civilian agencies are required to remediate it by 2021-11-17. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
- A vendor advisory or patch reference has been published.
Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Assigned by
- secure@microsoft.com
Dates
- Published
- 2021-08-12
- Last modified
- 2026-08-10
- Added to KEV
- 2021-11-03
- Remediation due
- 2021-11-17
- Sources
- CISA KEV, NVD
Affected products
- Microsoft Windows Server 2004- 10.0.19041.1165
- Microsoft Windows Server 2008all versions, r2
- Microsoft Windows Server 2012all versions, r2
- Microsoft Windows Server 2016- 10.0.14393.4583
- Microsoft Windows Server 2019- 10.0.17763.2114
- Microsoft Windows Server 20h2- 10.0.19042.1165
As listed in the NVD configuration data. Not a statement about your estate.