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CVE-2026-77505

Last refreshed2026-10-10

Status: UPDATED  |  Advisory ID: CVE-2026-77505

Key Details

CVECVE-2026-77505
CVSS Score / Version8.1 (High) / CVSS v3.1
Updated2026-09-28
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack 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 productssee table below
Classified asCWE-416 (Use After Free)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows Server 2025
MicrosoftWindows 10 (version 1607)
MicrosoftWindows 10 (version 1809)
MicrosoftWindows Server 2012
MicrosoftWindows Server 2016
MicrosoftWindows Server 2019
MicrosoftWindows Server 2022
MicrosoftWindows Server 2012 R2
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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

What to Do

Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-77505
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-77505
Vendor advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77505

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