PT-2026-40237 · Microsoft · Windows Dns

Published 2026-05-12 · Updated 2026-05-13 · CVE-2026-41096

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Windows DNS (affected versions not specified)

Description A heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network. A heap-based buffer overflow occurs when a program writes more data to a heap-allocated memory block than it can hold, potentially corrupting adjacent memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-41096

Affected Products

Windows Dns

References · 16

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41096 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-41096 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41096 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41096 · Security Note
• https://reddit.com/r/u_all-in-one-wisper/comments/1tbytog/daily_wisper_report_patch_tuesday_may_12_2026 · Reddit Post
• https://canto.today/en/p/microsoft-patches-critical-netlogon-flaw-4s10r4 · Reddit Post
• https://twitter.com/vuldb/status/2054265909347483797 · Twitter Post
• https://t.me/EchelonEyes/4581 · Telegram Post
• https://twitter.com/SirMwangala/status/2054468246678503710 · Twitter Post
• https://reddit.com/r/pwnhub/comments/1tbxlvh/major_security_flaws_discovered_in_windows · Reddit Post
• https://twitter.com/YourAnon_irc/status/2054456006654996984 · Twitter Post
• https://reddit.com/r/Automox/comments/1tbczuc/may_2026_patch_tuesday_breakdown_two_preauth_98 · Reddit Post
• https://reddit.com/r/pwnhub/comments/1tbxm2m/microsoft_addresses_138_vulnerabilities_including · Reddit Post
• https://twitter.com/catnap707/status/2054368040368910774 · Twitter Post
• https://twitter.com/windowsforum/status/2054294696675995674 · Twitter Post