CVE-2018-0959 — A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka "Hyper-V Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers

Back Back to CVE browser

HIGH

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka "Hyper-V Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers

Published May 9, 2018

7.6

HIGH

CVSS 3.0

EPSS 9.99%

Description

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka "Hyper-V Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Affected products

Vendor Microsoft Product Windows 10 Default
n/a
- Version
  Version 1607 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1703 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1709 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1803 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  x64-based Systems
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows 10 Servers Default
n/a
- Version
  version 1709 (Server Core Installation)
  Status
  affected
  Constraints
  -
- Version
  version 1803 (Server Core Installation)
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows 7 Default
n/a
- Version
  x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows 8.1 Default
n/a
- Version
  x64-based systems
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows RT 8.1 Default
n/a
- Version
  Windows RT 8.1
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows Server 2008 Default
n/a
- Version
  x64-based Systems Service Pack 2
  Status
  affected
  Constraints
  -
- Version
  x64-based Systems Service Pack 2 (Server Core installation)
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows Server 2008 R2 Default
n/a
- Version
  x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  x64-based Systems Service Pack 1 (Server Core installation)
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows Server 2012 Default
n/a
- Version
  (Server Core installation)
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows Server 2012 R2 Default
n/a
- Version
  (Server Core installation)
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows Server 2016 Default
n/a
- Version
  (Server Core installation)
  Status
  affected
  Constraints
  -

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

Version	Status	Constraints
Version 1607 for x64-based Systems	affected	-
Version 1703 for x64-based Systems	affected	-
Version 1709 for x64-based Systems	affected	-
Version 1803 for x64-based Systems	affected	-
x64-based Systems	affected	-

Microsoft

Windows 10 Servers

n/a

Version	Status	Constraints
version 1709 (Server Core Installation)	affected	-
version 1803 (Server Core Installation)	affected	-

Microsoft

Windows 7

n/a

Version	Status	Constraints
x64-based Systems Service Pack 1	affected	-

Microsoft

Windows 8.1

n/a

Version	Status	Constraints
x64-based systems	affected	-

Microsoft

Windows RT 8.1

n/a

Version	Status	Constraints
Windows RT 8.1	affected	-

Microsoft

Windows Server 2008

n/a

Version	Status	Constraints
x64-based Systems Service Pack 2	affected	-
x64-based Systems Service Pack 2 (Server Core installation)	affected	-

Microsoft

Windows Server 2008 R2

n/a

Version	Status	Constraints
x64-based Systems Service Pack 1	affected	-
x64-based Systems Service Pack 1 (Server Core installation)	affected	-

Microsoft

Windows Server 2012

n/a

Version	Status	Constraints
(Server Core installation)	affected	-

Microsoft

Windows Server 2012 R2

n/a

Version	Status	Constraints
(Server Core installation)	affected	-

Microsoft

Windows Server 2016

n/a

Version	Status	Constraints
(Server Core installation)	affected	-

Remediation

No remediation recorded yet.

Metrics

9.99% 0.09986

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.09986

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 (39 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	9.99% (0.09986)	95.47th	v5 (v2026.06.15)
Sep 15, 2026	9.99% (0.09986)	95.34th	v5 (v2026.06.15)
Aug 23, 2026	11.12% (0.11120)	95.67th	v5 (v2026.06.15)
Jun 15, 2026	9.44% (0.09437)	94.77th	v5 (v2026.06.15)
Jan 29, 2026	22.21% (0.22206)	95.64th	v4 (v2025.03.14)
Nov 23, 2025	23.97% (0.23975)	95.80th	v4 (v2025.03.14)
Mar 30, 2025	25.56% (0.25560)	95.77th	v4 (v2025.03.14)
Mar 29, 2025	28.57% (0.28573)	94.48th	v4 (v2025.03.14)
Mar 28, 2025	25.40% (0.25404)	95.75th	v4 (v2025.03.14)
Mar 27, 2025	28.41% (0.28408)	95.84th	v4 (v2025.03.14)
Mar 24, 2025	11.81% (0.11809)	93.06th	v4 (v2025.03.14)
Mar 23, 2025	25.40% (0.25404)	95.57th	v4 (v2025.03.14)
Mar 20, 2025	11.81% (0.11809)	93.15th	v4 (v2025.03.14)
Mar 19, 2025	25.40% (0.25404)	95.56th	v4 (v2025.03.14)
Mar 17, 2025	11.81% (0.11809)	93.16th	v4 (v2025.03.14)
Dec 17, 2024	16.84% (0.16845)	96.03th	v3 (v2023.03.01)
Dec 12, 2024	1.73% (0.01731)	88.38th	v3 (v2023.03.01)
Apr 18, 2024	1.63% (0.01631)	87.33th	v3 (v2023.03.01)
Mar 18, 2024	0.98% (0.00980)	83.06th	v3 (v2023.03.01)
Feb 22, 2024	0.52% (0.00515)	76.07th	v3 (v2023.03.01)
Feb 8, 2024	0.36% (0.00363)	71.53th	v3 (v2023.03.01)
Jan 23, 2024	0.36% (0.00363)	69.46th	v3 (v2023.03.01)
Dec 27, 2023	0.36% (0.00357)	69.13th	v3 (v2023.03.01)
Jul 21, 2023	0.31% (0.00313)	66.16th	v3 (v2023.03.01)
Jul 8, 2023	0.30% (0.00297)	65.18th	v3 (v2023.03.01)
May 8, 2023	0.34% (0.00338)	66.97th	v3 (v2023.03.01)
May 3, 2023	0.30% (0.00297)	64.81th	v3 (v2023.03.01)
Mar 7, 2023	0.25% (0.00250)	61.04th	v3 (v2023.03.01)
Mar 6, 2023	19.95% (0.19947)	96.42th	v2 (v2022.01.01)
Feb 3, 2023	19.95% (0.19947)	96.31th	v2 (v2022.01.01)
Jun 9, 2022	16.91% (0.16905)	95.91th	v2 (v2022.01.01)
Apr 25, 2022	16.07% (0.16070)	95.77th	v2 (v2022.01.01)
Apr 1, 2022	13.64% (0.13642)	95.41th	v2 (v2022.01.01)
Mar 22, 2022	13.64% (0.13642)	90.85th	v2 (v2022.01.01)
Feb 4, 2022	12.45% (0.12452)	89.48th	v2 (v2022.01.01)
Feb 3, 2022	17.55% (0.17549)	91.03th	v1
Jan 6, 2022	17.55% (0.17549)	90.92th	v1
Sep 1, 2021	17.55% (0.17549)	97.67th	v1
Apr 14, 2021	17.55% (0.17549)	0.00th	v1

Weaknesses (1)

CWE-20

Improper Input Validation

References (3)

http://www.securityfocus.com/bid/104031
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040843
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0959
x_refsource_CONFIRMPatchVendor Advisory

Link	Providers	Tags
http://www.securityfocus.com/bid/104031		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040843		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0959		x_refsource_CONFIRMPatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published May 9, 2018

Updated Aug 5, 2024

Reserved Dec 1, 2017

Link CVE-2018-0959

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-0959

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-0959