CVE-2018-8626
A remote code execution vulnerability exists in Windows Domain Name System (DNS) servers when they fail to properly handle requests, aka…
- 9.8CriticalCVSS base score
- 21.2%Exploitation in 30 daysEPSS · top 2.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A remote code execution vulnerability exists in Windows Domain Name System (DNS) servers when they fail to properly handle requests, aka "Windows DNS Server Heap Overflow Vulnerability." This affects Windows Server 2012 R2, Windows Server 2019, Windows Server 2016, Windows 10, Windows 10 Servers.
Timeline
ID reserved
By microsoft
- 9 months later
· 9 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 21.2% · top 2.4% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
Microsoft · Windows Server 2012 R2
- affected (Server Core installation)
Microsoft · Windows Server 2019
- affected (Server Core installation)
Microsoft · Windows Server 2016
- affected (Server Core installation)
- affected Version 1607 for 32-bit Systems
- affected Version 1607 for x64-based Systems
- affected Version 1709 for 32-bit Systems
- affected Version 1709 for ARM64-based Systems
- affected Version 1709 for x64-based Systems
- affected Version 1803 for 32-bit Systems
- affected Version 1803 for ARM64-based Systems
- affected Version 1803 for x64-based Systems
- affected Version 1809 for 32-bit Systems
- affected Version 1809 for ARM64-based Systems
- affected Version 1809 for x64-based Systems
Microsoft · Windows 10 Servers
- affected version 1709 (Server Core Installation)
- affected version 1803 (Server Core Installation)
References
2
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8626 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 106076 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-20238 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-8626)Record last updated .