CVE-2018-1003 — A buffer overflow vulnerability exists in the Microsoft JET Database Engine that could allow remote code execution on an affected system, 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 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10

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HIGH

A buffer overflow vulnerability exists in the Microsoft JET Database Engine that could allow remote code execution on an affected system, 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 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10

Published Apr 12, 2018

7.8

HIGH

CVSS 3.0

EPSS 22.81%

Description

A buffer overflow vulnerability exists in the Microsoft JET Database Engine that could allow remote code execution on an affected system, 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 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10.

Affected products

Vendor Microsoft Product Windows 10 Default
n/a
- Version
  32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1511 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Version 1511 for x64-based 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
  x64-based Systems
  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
  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
  -

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 1511 for 32-bit Systems	affected	-
Version 1511 for x64-based 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	-
x64-based Systems	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	-
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	-

Remediation

No remediation recorded yet.

Metrics

22.81% 0.22806

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

EPSS probability 0.22806

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 (46 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	22.81% (0.22806)	97.67th	v5 (v2026.06.15)
Sep 22, 2026	22.81% (0.22806)	97.63th	v5 (v2026.06.15)
Sep 21, 2026	20.79% (0.20792)	97.48th	v5 (v2026.06.15)
Sep 6, 2026	23.21% (0.23207)	97.62th	v5 (v2026.06.15)
Sep 5, 2026	20.92% (0.20920)	97.44th	v5 (v2026.06.15)
Aug 30, 2026	23.21% (0.23207)	97.60th	v5 (v2026.06.15)
Aug 28, 2026	20.92% (0.20920)	97.43th	v5 (v2026.06.15)
Aug 24, 2026	23.21% (0.23207)	97.59th	v5 (v2026.06.15)
Aug 23, 2026	20.92% (0.20920)	97.42th	v5 (v2026.06.15)
Jun 17, 2026	23.04% (0.23035)	97.46th	v5 (v2026.06.15)
Jun 15, 2026	21.68% (0.21684)	97.31th	v5 (v2026.06.15)
Nov 21, 2025	29.17% (0.29165)	96.38th	v4 (v2025.03.14)
Nov 18, 2025	33.58% (0.33576)	96.70th	v4 (v2025.03.14)
Sep 28, 2025	29.17% (0.29165)	96.44th	v4 (v2025.03.14)
Sep 13, 2025	26.64% (0.26642)	96.16th	v4 (v2025.03.14)
Aug 31, 2025	30.87% (0.30873)	96.58th	v4 (v2025.03.14)
Aug 4, 2025	24.04% (0.24036)	95.81th	v4 (v2025.03.14)
Apr 6, 2025	15.91% (0.15910)	94.19th	v4 (v2025.03.14)
Mar 30, 2025	9.50% (0.09495)	92.07th	v4 (v2025.03.14)
Mar 29, 2025	26.49% (0.26491)	94.09th	v4 (v2025.03.14)
Mar 17, 2025	9.50% (0.09495)	92.25th	v4 (v2025.03.14)
Mar 15, 2025	86.19% (0.86190)	98.87th	v3 (v2023.03.01)
Dec 17, 2024	87.33% (0.87325)	98.88th	v3 (v2023.03.01)
Aug 27, 2024	26.60% (0.26602)	96.83th	v3 (v2023.03.01)
Apr 27, 2024	24.14% (0.24141)	96.55th	v3 (v2023.03.01)
Mar 22, 2024	23.23% (0.23230)	96.44th	v3 (v2023.03.01)
Feb 20, 2024	22.50% (0.22499)	96.35th	v3 (v2023.03.01)
Jan 25, 2024	14.85% (0.14849)	95.30th	v3 (v2023.03.01)
Dec 26, 2023	14.87% (0.14874)	95.28th	v3 (v2023.03.01)
Nov 29, 2023	13.56% (0.13563)	95.05th	v3 (v2023.03.01)
Sep 23, 2023	16.30% (0.16299)	95.35th	v3 (v2023.03.01)
Sep 2, 2023	15.80% (0.15805)	95.23th	v3 (v2023.03.01)
Jul 21, 2023	14.04% (0.14035)	94.94th	v3 (v2023.03.01)
Apr 5, 2023	13.32% (0.13320)	94.65th	v3 (v2023.03.01)
Mar 7, 2023	12.04% (0.12040)	94.42th	v3 (v2023.03.01)
Mar 6, 2023	39.32% (0.39320)	98.11th	v2 (v2022.01.01)
Jan 6, 2023	39.32% (0.39320)	98.06th	v2 (v2022.01.01)
Aug 2, 2022	34.60% (0.34599)	97.70th	v2 (v2022.01.01)
May 12, 2022	32.42% (0.32419)	97.49th	v2 (v2022.01.01)
Mar 28, 2022	31.10% (0.31104)	96.45th	v2 (v2022.01.01)
Feb 22, 2022	27.14% (0.27139)	95.87th	v2 (v2022.01.01)
Feb 4, 2022	23.10% (0.23099)	94.56th	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-119

Buffer Overflow

References (3)

http://www.securityfocus.com/bid/103655
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040651
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1003
x_refsource_CONFIRMPatchVendor Advisory

Link	Providers	Tags
http://www.securityfocus.com/bid/103655		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040651		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1003		x_refsource_CONFIRMPatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published Apr 12, 2018

Updated Aug 5, 2024

Reserved Dec 1, 2017

Link CVE-2018-1003

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-1003

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-1003