CVE-2026-69631
Windows DNS Denial of Service Vulnerability
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service 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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows DNS Denial of Service Vulnerability
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-69631- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Weakness
- CWE-190
- Updated
- 2026-11-10
EUVDEUVD-2026-73036
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service over a network.
- Record
EUVD-2026-73036- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-3cxv-6w3j-w4rq
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service...
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service over a network.
- Record
GHSA-3cxv-6w3j-w4rq- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
NVD
Integer overflow or wraparound in Windows DNS allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-69631- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2025
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-69631 is a high vulnerability (CVSS 7.5) in Microsoft Windows 10 Version 1607, published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.17%, the 67th percentile. No source names a fixed version.