Status: UPDATED | Advisory ID: CVE-2026-77505
| CVE | CVE-2026-77505 |
| CVSS Score / Version | 8.1 (High) / CVSS v3.1 |
| Updated | 2026-09-28 |
| CVSS Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is high; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | see table below |
| Classified as | CWE-416 (Use After Free) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Microsoft | Windows Server 2025 | ||
| Microsoft | Windows 10 (version 1607) | ||
| Microsoft | Windows 10 (version 1809) | ||
| Microsoft | Windows Server 2012 | ||
| Microsoft | Windows Server 2016 | ||
| Microsoft | Windows Server 2019 | ||
| Microsoft | Windows Server 2022 | ||
| Microsoft | Windows Server 2012 R2 |
| Subsystems | OT Supporting Infrastructure |
| Sectors | All Sectors |
Use after free in DNS Server allows an unauthorized attacker to execute code over a network.
Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.