CVE-2026-35420
Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-35420 is fixed in 13 products on 1 platform, first by KB5087537, released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0032
25th percentile
<p>Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows Server 2012 | KB5087470 | May 12, 2026 | |
| Windows Server 2012 (Server Core installation) | KB5087470 | May 12, 2026 | |
| Windows Server 2012 R2 | KB5087471 | May 12, 2026 | |
| Windows Server 2012 R2 (Server Core installation) | KB5087471 | May 12, 2026 | |
| Windows Server 2016 | 14393.9140 | KB5087537 | May 12, 2026 |
| Windows Server 2016 (Server Core installation) | 14393.9140 | KB5087537 | May 12, 2026 |
| Windows Server 2019 | 17763.8755 | KB5087538 | May 12, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.8755 | KB5087538 | May 12, 2026 |
| Windows Server 2022 | 20348.5074 | KB5087424 | May 12, 2026 |
| Windows Server 2022 | 20348.5139 | KB5087545 | May 12, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5074 | KB5087424 | May 12, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5139 | KB5087545 | May 12, 2026 |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.2330 | KB5087541 | May 12, 2026 |
| Windows Server 2025 | 26100.32860 | KB5087539 | May 12, 2026 |
| Windows Server 2025 | 26100.32772 | KB5087423 | May 12, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.32860 | KB5087539 | May 12, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.32772 | KB5087423 | May 12, 2026 |
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