CRITICAL
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
Published Dec 12, 2018
9.8
CRITICALCVSS 3.0
EPSS 21.24%
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.
Affected products
-
- Version Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1709 for ARM64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1803 for ARM64-based SystemsStatusaffectedConstraints-
- Version Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1809 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1809 for ARM64-based SystemsStatusaffectedConstraints-
- Version Version 1809 for x64-based SystemsStatusaffectedConstraints-
- Version
-
- Version version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 | n/a |
| ||||||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Servers | n/a |
| ||||||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| ||||||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2016 | n/a |
| ||||||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2019 | n/a |
|
OR
- 1607
- 1709
- 1803
- 1809
- r2
- n/a
- 1709
- 1803
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
21.24% 0.21241
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.21241
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (43 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 21.24% (0.21241) | 97.53th | v5 (v2026.06.15) |
| Sep 22, 2026 | 21.24% (0.21241) | 97.48th | v5 (v2026.06.15) |
| Sep 21, 2026 | 34.81% (0.34812) | 98.40th | v5 (v2026.06.15) |
| Sep 6, 2026 | 21.24% (0.21241) | 97.43th | v5 (v2026.06.15) |
| Sep 5, 2026 | 34.81% (0.34812) | 98.36th | v5 (v2026.06.15) |
| Aug 30, 2026 | 21.24% (0.21241) | 97.42th | v5 (v2026.06.15) |
| Aug 28, 2026 | 34.62% (0.34624) | 98.34th | v5 (v2026.06.15) |
| Aug 24, 2026 | 21.12% (0.21115) | 97.39th | v5 (v2026.06.15) |
| Aug 23, 2026 | 34.62% (0.34624) | 98.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 21.12% (0.21115) | 97.25th | v5 (v2026.06.15) |
| May 30, 2026 | 34.99% (0.34987) | 97.11th | v4 (v2025.03.14) |
| May 15, 2026 | 36.22% (0.36216) | 97.16th | v4 (v2025.03.14) |
| May 2, 2026 | 33.48% (0.33476) | 96.95th | v4 (v2025.03.14) |
| Dec 18, 2025 | 27.56% (0.27555) | 96.25th | v4 (v2025.03.14) |
| Dec 6, 2025 | 19.69% (0.19687) | 95.20th | v4 (v2025.03.14) |
| Nov 21, 2025 | 15.38% (0.15380) | 94.36th | v4 (v2025.03.14) |
| Nov 18, 2025 | 17.23% (0.17235) | 94.51th | v4 (v2025.03.14) |
| May 26, 2025 | 14.74% (0.14737) | 94.12th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.07% (0.20067) | 95.01th | v4 (v2025.03.14) |
| Mar 29, 2025 | 39.23% (0.39235) | 95.90th | v4 (v2025.03.14) |
| Mar 19, 2025 | 20.07% (0.20067) | 94.78th | v4 (v2025.03.14) |
| Mar 17, 2025 | 17.03% (0.17033) | 94.49th | v4 (v2025.03.14) |
| Dec 17, 2024 | 5.45% (0.05449) | 93.07th | v3 (v2023.03.01) |
| Nov 21, 2024 | 6.64% (0.06644) | 94.04th | v3 (v2023.03.01) |
| Oct 21, 2024 | 5.31% (0.05311) | 93.25th | v3 (v2023.03.01) |
| May 25, 2024 | 3.31% (0.03312) | 91.32th | v3 (v2023.03.01) |
| May 4, 2024 | 2.58% (0.02579) | 90.18th | v3 (v2023.03.01) |
| Mar 22, 2024 | 2.70% (0.02697) | 90.23th | v3 (v2023.03.01) |
| Dec 5, 2023 | 2.54% (0.02538) | 89.01th | v3 (v2023.03.01) |
| Apr 24, 2023 | 3.12% (0.03124) | 89.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.33% (0.03332) | 89.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 13.37% (0.13370) | 95.72th | v2 (v2022.01.01) |
| Jan 11, 2023 | 13.37% (0.13370) | 95.52th | v2 (v2022.01.01) |
| Nov 27, 2022 | 12.68% (0.12683) | 95.42th | v2 (v2022.01.01) |
| Oct 24, 2022 | 10.70% (0.10702) | 94.50th | v2 (v2022.01.01) |
| Sep 17, 2022 | 8.36% (0.08358) | 93.33th | v2 (v2022.01.01) |
| Jun 7, 2022 | 7.62% (0.07619) | 92.36th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.96% (0.05960) | 89.66th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.96% (0.05960) | 77.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 13.74% (0.13741) | 89.37th | v1 |
| Jan 6, 2022 | 13.74% (0.13741) | 89.25th | v1 |
| Sep 1, 2021 | 13.74% (0.13741) | 96.74th | v1 |
| Apr 14, 2021 | 13.74% (0.13741) | 0.00th | v1 |
Weaknesses (1)
References (2)
- http://www.securityfocus.com/bid/106076 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8626 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106076 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8626 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Dec 12, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8626
CISA Vulnrichment
Updated n/a