Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
9.8

Windows 10/11 LSASS can let attackers run code remotely

CVE-2026-96219 · published 21 days ago
Summary

The Local Security Authority Subsystem Service in Windows 10 (versions 1809, 21H2, 22H2) and Windows 11 (versions 23H2, 24H2) can be tricked into writing data outside its intended area. This lets an unauthenticated attacker send specially crafted network traffic and cause the system to run their own code, potentially compromising the machine. Apply the latest security updates from Microsoft as soon as possible to close the gap.

What to do
  • Update microsoft windows 10 version 1809 to version 10.0.17763.9376 or later.
  • Update microsoft windows 10 version 21h2 to version 10.0.19044.7807 or later.
  • Update microsoft windows 11 version 23h2 to version 10.0.22631.7652 or later.
  • Update microsoft windows 11 version 24h2 to version 10.0.26100.9711 or later.
  • Update microsoft windows 11 version 25h2 to version 10.0.26200.9711 or later.
  • Update microsoft windows 11 version 26h1 to version 10.0.28000.3231 or later.
  • Update microsoft windows 11 version 26h2 to version 10.0.26300.9711 or later.
  • Update microsoft windows server 2019 to version 10.0.17763.9376 or later.
  • Update microsoft windows server 2019 (server core installation) to version 10.0.17763.9376 or later.
  • Update microsoft windows server 2022 to version 10.0.20348.5761 or later.
  • Update microsoft windows server 2025 to version 10.0.26100.33650 or later.
  • Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33650 or later.
  • Update microsoft windows_10_1809 to version 10.0.17763.9376 or later.
  • Update microsoft windows_10_21h2 to version 10.0.19044.7807 or later.
  • Update microsoft windows_10_22h2 to version 10.0.19045.7807 or later.
  • Update microsoft windows_11_23h2 to version 10.0.22631.7652 or later.
  • Update microsoft windows_11_24h2 to version 10.0.26100.9711 or later.
  • Update microsoft windows_11_25h2 to version 10.0.26200.9711 or later.
  • Update microsoft windows_11_26h1 to version 10.0.28000.3231 or later.
  • Update microsoft windows_11_26h2 to version 10.0.26300.9711 or later.
  • Update microsoft windows_server_2019 to version 10.0.17763.9376 or later.
  • Update microsoft windows_server_2022 to version 10.0.20348.5761 or later.
  • Update microsoft windows_server_2025 to version 10.0.26100.33650 or later.
Affected software
VendorProductAffected versions
microsoft windows 10 version 1809 < 10.0.17763.9376
microsoft windows 10 version 21h2 < 10.0.19044.7807
microsoft windows 10 version 22h2 < 10.0.19044.7807
< 10.0.19045.7807
microsoft windows 11 version 23h2 < 10.0.22631.7652
microsoft windows 11 version 24h2 < 10.0.26100.9711
microsoft windows 11 version 25h2 < 10.0.26200.9711
microsoft windows 11 version 26h1 < 10.0.28000.3231
microsoft windows 11 version 26h2 < 10.0.26300.9711
microsoft windows server 2019 < 10.0.17763.9376
microsoft windows server 2019 (server core installation) < 10.0.17763.9376
microsoft windows server 2022 < 10.0.20348.5761
microsoft windows server 2025 < 10.0.26100.33650
microsoft windows server 2025 (server core installation) < 10.0.26100.33650
microsoft windows_10_1809 < 10.0.17763.9376
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
microsoft windows_10_21h2 < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
microsoft windows_10_22h2 < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
microsoft windows_11_23h2 < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
microsoft windows_11_24h2 < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
microsoft windows_11_25h2 < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
microsoft windows_11_26h1 < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
microsoft windows_11_26h2 < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:*
microsoft windows_server_2019 < 10.0.17763.9376
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoft windows_server_2022 < 10.0.20348.5761
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*
microsoft windows_server_2025 < 10.0.26100.33650
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*
Original advisory text
Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.8 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-787Out-of-bounds Write
Timeline
Published13 Oct 2026
Updated4 Nov 2026
First seen13 Oct 2026
Sources
CVE-2026-96219 · NVD
CVE-2026-96219 · MITRE
Track software like this
Free during beta