Advisoriesby IbisMicrosoftCVE-2026-65789
Microsoft Windows DNS: use after free
Fix: upgrade to 10.0.14393.9418 or later (4 fixed versions below)
Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows Server 2016 Product | >= 10.0.14393.0, < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2016 (Server Core installation) Product | >= 10.0.14393.0, < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2019 Product | >= 10.0.17763.0, < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2019 (Server Core installation) Product | >= 10.0.17763.0, < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2022 Product | >= 10.0.20348.0, < 10.0.20348.5499 | 10.0.20348.5499 |
| Windows Server 2025 Product | >= 10.0.26100.0, < 10.0.26100.33296 | 10.0.26100.33296 |
| Windows Server 2025 (Server Core installation) Product | >= 10.0.26100.0, < 10.0.26100.33296 | 10.0.26100.33296 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-416