CVE-2026-96219
Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.
Executive briefing
The source record describes: Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network. The practical risk depends on whether an affected product/version is present, reachable and configured in an exploitable way. Review the affected-product evidence and linked vendor advisories before assigning exposure status.
Evidence confidence: Moderate Evidence-derived, not an exploitability verdict
Severity & attack characteristics
CVSS vector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Technical explanation & impact
The technical mechanism is not expanded beyond the source description unless a referenced advisory supplies additional evidence. Read the linked vendor/CERT advisories for root-cause detail.
Potential impact must be interpreted from the published CVSS impact metrics and the affected component. A CVSS impact score is not proof that a particular asset is exploitable.
Weakness classification
CWE-787Affected products and versions
Products below are parsed from NVD vulnerable CPE configuration entries. Version boundaries are shown as published; verify applicability with the vendor.
| Vendor | Product | Version evidence |
|---|---|---|
| microsoft | windows_10_1809 | before 10.0.17763.9376 · before 10.0.17763.9376 |
| microsoft | windows_10_21h2 | before 10.0.19044.7807 · before 10.0.19044.7807 · before 10.0.19044.7807 |
| microsoft | windows_10_22h2 | before 10.0.19045.7807 · before 10.0.19045.7807 · before 10.0.19045.7807 |
| microsoft | windows_11_23h2 | before 10.0.22631.7652 · before 10.0.22631.7652 |
| microsoft | windows_11_24h2 | before 10.0.26100.9711 · before 10.0.26100.9711 |
| microsoft | windows_11_25h2 | before 10.0.26200.9711 · before 10.0.26200.9711 |
| microsoft | windows_11_26h1 | before 10.0.28000.3231 · before 10.0.28000.3231 |
| microsoft | windows_11_26h2 | before 10.0.26300.9711 · before 10.0.26300.9711 |
| microsoft | windows_server_2019 | before 10.0.17763.9376 |
| microsoft | windows_server_2022 | before 10.0.20348.5761 |
| microsoft | windows_server_2025 | before 10.0.26100.33650 |
Remediation & validation
- Identify exposure by comparing the affected product and version ranges with your asset inventory, SBOM and externally exposed services.
- Review the linked vendor security advisory or patch notes. Upgrade to a vendor-confirmed fixed release; do not infer a fixed version from the CVE description.
- Until patched, consider restricting network access or disabling the affected feature where operationally safe. These are temporary controls, not a substitute for a vendor fix.
- Validate the remediation with a version check and vulnerability rescan, then retain change evidence.
No fixed version is displayed unless it is explicitly established by a vendor advisory. Follow the vendor's release notes for exact product and branch applicability.
Vendor advisories, patches & exploit references
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96219 ADVISORY secure@microsoft.com