CVE-2026-20875: Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Other sources
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.22968Patch KB5073696 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.0.6003.23717Patch KB5073700 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.25868Patch KB5073698 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.1.7601.28117Patch KB5073699 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.8783Patch KB5073722 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.32230Patch KB5073379 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.7623Patch KB5074109 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.25398.2092Patch KB5073450 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.6491Patch KB5073455 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.7623Patch KB5074109 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.6809Patch KB5073724 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.6809Patch KB5073724 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.4648Patch KB5073457 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.8276Patch KB5073723
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20875?
CVE-2026-20875 is classified as a Denial of Service vulnerability affecting Windows Local Security Authority Subsystem Service.
How do I fix CVE-2026-20875?
To fix CVE-2026-20875, it is recommended to apply the latest security patches provided by Microsoft for the affected products.
Which Windows versions are impacted by CVE-2026-20875?
CVE-2026-20875 affects several versions of Windows including Server 2008, Server 2012, and Windows 11.
Can CVE-2026-20875 be exploited remotely?
Yes, CVE-2026-20875 can be exploited remotely, allowing unauthorized attackers to cause denial of service.
Is there a workaround for CVE-2026-20875?
There is no official workaround for CVE-2026-20875; applying the official security updates is the only recommended action.