CVE-2026-41096
Windows DNS Client Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows DNS Client Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-41096- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-122
- Updated
- 2026-11-02
EUVDEUVD-2026-29684
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-29684- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9pgv-xqpg-75rv
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute...
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
GHSA-9pgv-xqpg-75rv- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
NVD
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-41096- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
Affected products
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows 11 25h2
- microsoft windows 11 26h1
- microsoft windows server 2022 23h2
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | mrk336/DNS-Mayhem-CVE-2026-41096-Deep-Dive | 2026-05-15 |
| PoC in GitHub | m0n1x90/CVE-2026-41096 | 2026-05-24 |
| PoC in GitHub | satchfunky/CVE-2026-41096-POC | 2026-05-24 |
| PoC in GitHub | TwoSevenOneT/CVE-2026-41096-Attack-Surface | 2026-06-04 |
| PoC in GitHub | personnumber3377/dns_client_fuzzing | 2026-06-23 |
| PoC in GitHub | wuyou6956-glitch/CVE-2026-41096-POC | 2026-09-30 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits, facts | PoC in GitHub | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-41096 is a critical vulnerability (CVSS 9.8) in Microsoft Windows 11 Version 23h2, published May 12, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.70%, the 86th percentile. No source names a fixed version.