CVE-2026-62878
Windows DNS Server Remote Code Execution Vulnerability
Stack-based buffer overflow in 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 Server Remote Code Execution Vulnerability
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-62878- 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-121
- Updated
- 2026-11-02
EUVDEUVD-2026-56400
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-56400- 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-6f49-r342-pg5p
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a...
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
GHSA-6f49-r342-pg5p- 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-121
- Updated
- 2026-11-02
NVD
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-62878- 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-121
- Updated
- 2026-11-02
Affected products
- 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
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 1607
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Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | nmlz/CVE-2026-62878 | 2026-09-24 |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2026-62878 is a critical vulnerability (CVSS 9.8) in Microsoft Windows Server 2012, published August 11, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.97%, the 62nd percentile. No source names a fixed version.