CVE-2026-62817
Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-62817 is fixed in 6 products on 1 platform, first by KB5120238, released August 11, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
Urgent
CVSS
8.8
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0054
45th percentile
<p>Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows Server 2019 | 17763.9121 | KB5120238 | Aug 11, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.9121 | KB5120238 | Aug 11, 2026 |
| Windows Server 2022 | 20348.5440 | KB5120229 | Aug 11, 2026 |
| Windows Server 2022 | 20348.5499 | KB5120242 | Aug 11, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5440 | KB5120229 | Aug 11, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5499 | KB5120242 | Aug 11, 2026 |
| Windows Server 2025 | 26100.33222 | KB5120228 | Aug 11, 2026 |
| Windows Server 2025 | 26100.33296 | KB5120233 | Aug 11, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.33222 | KB5120228 | Aug 11, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.33296 | KB5120233 | Aug 11, 2026 |
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