CVE-2026-62817
Windows DNS Server Remote Code Execution Vulnerability
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent 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 Server Remote Code Execution Vulnerability
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
- Record
CVE-2026-62817- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2026-56394
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
- Record
EUVD-2026-56394- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:A/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-6pr5-hpq7-qp74
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an...
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
- Record
GHSA-6pr5-hpq7-qp74- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
- Record
CVE-2026-62817- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 1809
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows 11 25h2
- microsoft windows 11 26h1
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-62817 is a high vulnerability (CVSS 8.8) in Microsoft Windows Server 2019, published August 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. No source names a fixed version.