CVE-2018-8423 — A remote code execution vulnerability exists in the Microsoft JET Database Engine, aka "Microsoft JET Database Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers

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HIGH

A remote code execution vulnerability exists in the Microsoft JET Database Engine, aka "Microsoft JET Database Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers

Published Oct 10, 2018

7.8

HIGH

CVSS 3.0

EPSS 32.15%

Description

A remote code execution vulnerability exists in the Microsoft JET Database Engine, aka "Microsoft JET Database Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, 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
  32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1607 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1607 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1703 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1703 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1709 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1709 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1803 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1803 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1809 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1809 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
  32-bit Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Windows 8.1 Default
n/a
- Version
  32-bit systems
  Status
  affected
  Constraints
  -
- 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
  32-bit Systems Service Pack 2
  Status
  affected
  Constraints
  -
- Version
  32-bit Systems Service Pack 2 (Server Core installation)
  Status
  affected
  Constraints
  -
- Version
  Itanium-Based Systems Service Pack 2
  Status
  affected
  Constraints
  -
- 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
  Itanium-Based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- 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
  -
Vendor Microsoft Product Windows Server 2019 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
32-bit Systems	affected	-
Version 1607 for 32-bit Systems	affected	-
Version 1607 for x64-based Systems	affected	-
Version 1703 for 32-bit Systems	affected	-
Version 1703 for x64-based Systems	affected	-
Version 1709 for 32-bit Systems	affected	-
Version 1709 for x64-based Systems	affected	-
Version 1803 for 32-bit Systems	affected	-
Version 1803 for x64-based Systems	affected	-
Version 1809 for 32-bit Systems	affected	-
Version 1809 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
32-bit Systems Service Pack 1	affected	-
x64-based Systems Service Pack 1	affected	-

Microsoft

Windows 8.1

n/a

Version	Status	Constraints
32-bit systems	affected	-
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
32-bit Systems Service Pack 2	affected	-
32-bit Systems Service Pack 2 (Server Core installation)	affected	-
Itanium-Based Systems Service Pack 2	affected	-
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
Itanium-Based Systems Service Pack 1	affected	-
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	-

Microsoft

Windows Server 2019

n/a

Version	Status	Constraints
(Server Core installation)	affected	-

Remediation

No remediation recorded yet.

Metrics

32.15% 0.32152

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

EPSS probability 0.32152

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 (47 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	32.15% (0.32152)	98.27th	v5 (v2026.06.15)
Sep 22, 2026	32.15% (0.32152)	98.24th	v5 (v2026.06.15)
Sep 21, 2026	29.17% (0.29168)	98.13th	v5 (v2026.06.15)
Sep 6, 2026	32.15% (0.32152)	98.20th	v5 (v2026.06.15)
Sep 5, 2026	29.17% (0.29168)	98.09th	v5 (v2026.06.15)
Aug 30, 2026	32.15% (0.32152)	98.19th	v5 (v2026.06.15)
Aug 28, 2026	27.72% (0.27720)	97.99th	v5 (v2026.06.15)
Aug 24, 2026	32.70% (0.32705)	98.21th	v5 (v2026.06.15)
Aug 23, 2026	27.72% (0.27720)	97.99th	v5 (v2026.06.15)
Jun 15, 2026	32.70% (0.32705)	98.11th	v5 (v2026.06.15)
Sep 3, 2025	57.23% (0.57231)	98.08th	v4 (v2025.03.14)
Mar 30, 2025	50.72% (0.50721)	97.62th	v4 (v2025.03.14)
Mar 29, 2025	48.03% (0.48030)	96.67th	v4 (v2025.03.14)
Mar 17, 2025	50.72% (0.50721)	97.59th	v4 (v2025.03.14)
Jan 13, 2025	19.99% (0.19986)	96.36th	v3 (v2023.03.01)
Dec 17, 2024	23.20% (0.23199)	96.56th	v3 (v2023.03.01)
Oct 25, 2024	59.13% (0.59129)	97.82th	v3 (v2023.03.01)
Sep 19, 2024	60.58% (0.60579)	97.84th	v3 (v2023.03.01)
Aug 19, 2024	63.28% (0.63282)	97.92th	v3 (v2023.03.01)
Jul 25, 2024	61.64% (0.61642)	97.86th	v3 (v2023.03.01)
Jun 25, 2024	65.31% (0.65307)	97.93th	v3 (v2023.03.01)
May 29, 2024	71.46% (0.71457)	98.06th	v3 (v2023.03.01)
Mar 23, 2024	76.91% (0.76906)	98.13th	v3 (v2023.03.01)
Mar 2, 2024	81.39% (0.81390)	98.25th	v3 (v2023.03.01)
Feb 9, 2024	79.97% (0.79968)	98.18th	v3 (v2023.03.01)
Jan 19, 2024	81.84% (0.81842)	98.11th	v3 (v2023.03.01)
Jan 2, 2024	74.48% (0.74477)	97.85th	v3 (v2023.03.01)
Dec 15, 2023	74.24% (0.74236)	97.84th	v3 (v2023.03.01)
Oct 22, 2023	74.81% (0.74814)	97.79th	v3 (v2023.03.01)
Oct 4, 2023	76.22% (0.76224)	97.81th	v3 (v2023.03.01)
Sep 19, 2023	77.42% (0.77423)	97.83th	v3 (v2023.03.01)
Aug 16, 2023	72.83% (0.72831)	97.66th	v3 (v2023.03.01)
Jul 11, 2023	73.57% (0.73567)	97.65th	v3 (v2023.03.01)
Jun 27, 2023	66.56% (0.66559)	97.44th	v3 (v2023.03.01)
Jun 7, 2023	63.47% (0.63465)	97.33th	v3 (v2023.03.01)
May 6, 2023	60.27% (0.60269)	97.21th	v3 (v2023.03.01)
Mar 8, 2023	63.34% (0.63337)	97.23th	v3 (v2023.03.01)
Mar 7, 2023	59.54% (0.59538)	97.15th	v3 (v2023.03.01)
Mar 6, 2023	42.81% (0.42807)	98.30th	v2 (v2022.01.01)
Aug 23, 2022	42.81% (0.42807)	98.18th	v2 (v2022.01.01)
Jul 17, 2022	40.13% (0.40133)	98.09th	v2 (v2022.01.01)
Apr 6, 2022	37.74% (0.37741)	97.77th	v2 (v2022.01.01)
Feb 4, 2022	33.43% (0.33428)	96.61th	v2 (v2022.01.01)
Feb 3, 2022	21.04% (0.21041)	94.24th	v1
Jan 6, 2022	21.04% (0.21041)	94.18th	v1
Sep 1, 2021	21.04% (0.21041)	97.94th	v1
Apr 14, 2021	21.04% (0.21041)	0.00th	v1

Weaknesses (1)

CWE-119

Buffer Overflow

References (4)

http://www.securitytracker.com/id/1041837
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://blog.0patch.com/2018/09/outrunning-attackers-on-jet-database.html
x_refsource_MISCExploitPatchTechnical DescriptionThird Party Advisory
https://blog.0patch.com/2018/10/patching-re-patching-and-meta-patching.html
x_refsource_MISCExploitPatchTechnical DescriptionThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8423
x_refsource_CONFIRMPatchVendor Advisory

Link	Providers	Tags
http://www.securitytracker.com/id/1041837		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://blog.0patch.com/2018/09/outrunning-attackers-on-jet-database.html		x_refsource_MISCExploitPatchTechnical DescriptionThird Party Advisory
https://blog.0patch.com/2018/10/patching-re-patching-and-meta-patching.html		x_refsource_MISCExploitPatchTechnical DescriptionThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8423		x_refsource_CONFIRMPatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published Oct 10, 2018

Updated Aug 5, 2024

Reserved Mar 14, 2018

Link CVE-2018-8423

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-8423

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-8423