CVE-2026-77505

high

Use after free in DNS Server allows an unauthorized attacker to execute code over a network.

Vendor / product: Microsoft — windows 10 1607

Use after free in DNS Server allows an unauthorized attacker to execute code over a network.

CVSS

8.1

8.1 (CVSS v3.1)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (secure@microsoft.com)

Timeline (UTC)

Published: 2026-09-08 18:20

Modified: 2026-09-28 20:17

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:52 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

microsoft / windows_10_1607 <10.0.14393.9512

microsoft / windows_10_1809 <10.0.17763.9245

microsoft / windows_server_2012 all versions, r2

microsoft / windows_server_2016 <10.0.14393.9512

microsoft / windows_server_2019 <10.0.17763.9245

microsoft / windows_server_2022 <10.0.20348.5622

microsoft / windows_server_2025 <10.0.26100.33438

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗