CVE-2018-8552 — An information disclosure vulnerability exists when VBScript improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user's computer or data, aka "Windows Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10

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HIGH

An information disclosure vulnerability exists when VBScript improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user's computer or data, aka "Windows Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10

Published Nov 14, 2018

7.5

HIGH

CVSS 3.0

EPSS 50.96%

Description

An information disclosure vulnerability exists when VBScript improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user's computer or data, aka "Windows Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.

Affected products

Vendor Microsoft Product Internet Explorer 10 Default
n/a
- Version
  Windows Server 2012
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Internet Explorer 11 Default
n/a
- Version
  Windows 10 Version 1607 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1607 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for ARM64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for ARM64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1809 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1809 for ARM64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1809 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 7 for 32-bit Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows 7 for x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows 8.1 for 32-bit systems
  Status
  affected
  Constraints
  -
- Version
  Windows 8.1 for x64-based systems
  Status
  affected
  Constraints
  -
- Version
  Windows RT 8.1
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2008 R2 for x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2012 R2
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2016
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2019
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Internet Explorer 9 Default
n/a
- Version
  Windows Server 2008 for 32-bit Systems Service Pack 2
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2008 for x64-based Systems Service Pack 2
  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

Internet Explorer 10

n/a

Version	Status	Constraints
Windows Server 2012	affected	-

Microsoft

Internet Explorer 11

n/a

Version	Status	Constraints
Windows 10 Version 1607 for 32-bit Systems	affected	-
Windows 10 Version 1607 for x64-based Systems	affected	-
Windows 10 Version 1703 for 32-bit Systems	affected	-
Windows 10 Version 1703 for x64-based Systems	affected	-
Windows 10 Version 1709 for 32-bit Systems	affected	-
Windows 10 Version 1709 for ARM64-based Systems	affected	-
Windows 10 Version 1709 for x64-based Systems	affected	-
Windows 10 Version 1803 for 32-bit Systems	affected	-
Windows 10 Version 1803 for ARM64-based Systems	affected	-
Windows 10 Version 1803 for x64-based Systems	affected	-
Windows 10 Version 1809 for 32-bit Systems	affected	-
Windows 10 Version 1809 for ARM64-based Systems	affected	-
Windows 10 Version 1809 for x64-based Systems	affected	-
Windows 10 for 32-bit Systems	affected	-
Windows 10 for x64-based Systems	affected	-
Windows 7 for 32-bit Systems Service Pack 1	affected	-
Windows 7 for x64-based Systems Service Pack 1	affected	-
Windows 8.1 for 32-bit systems	affected	-
Windows 8.1 for x64-based systems	affected	-
Windows RT 8.1	affected	-
Windows Server 2008 R2 for x64-based Systems Service Pack 1	affected	-
Windows Server 2012 R2	affected	-
Windows Server 2016	affected	-
Windows Server 2019	affected	-

Microsoft

Internet Explorer 9

n/a

Version	Status	Constraints
Windows Server 2008 for 32-bit Systems Service Pack 2	affected	-
Windows Server 2008 for x64-based Systems Service Pack 2	affected	-

Remediation

No remediation recorded yet.

Metrics

50.96% 0.50964

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

EPSS probability 0.50964

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 (57 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	50.96% (0.50964)	98.90th	v5 (v2026.06.15)
Sep 22, 2026	50.96% (0.50964)	98.88th	v5 (v2026.06.15)
Sep 21, 2026	37.42% (0.37422)	98.51th	v5 (v2026.06.15)
Sep 6, 2026	50.96% (0.50964)	98.85th	v5 (v2026.06.15)
Sep 5, 2026	37.42% (0.37422)	98.48th	v5 (v2026.06.15)
Aug 30, 2026	50.96% (0.50964)	98.84th	v5 (v2026.06.15)
Aug 28, 2026	37.42% (0.37422)	98.47th	v5 (v2026.06.15)
Aug 24, 2026	50.96% (0.50964)	98.84th	v5 (v2026.06.15)
Aug 23, 2026	37.42% (0.37422)	98.46th	v5 (v2026.06.15)
Jun 15, 2026	50.96% (0.50964)	98.78th	v5 (v2026.06.15)
May 31, 2026	47.44% (0.47442)	97.75th	v4 (v2025.03.14)
May 2, 2026	53.14% (0.53136)	97.98th	v4 (v2025.03.14)
Apr 4, 2026	56.27% (0.56273)	98.10th	v4 (v2025.03.14)
Nov 21, 2025	61.40% (0.61400)	98.22th	v4 (v2025.03.14)
Nov 18, 2025	71.13% (0.71131)	98.76th	v4 (v2025.03.14)
Oct 15, 2025	61.40% (0.61400)	98.22th	v4 (v2025.03.14)
May 28, 2025	62.48% (0.62484)	98.24th	v4 (v2025.03.14)
May 26, 2025	59.02% (0.59023)	98.08th	v4 (v2025.03.14)
Mar 30, 2025	51.22% (0.51223)	97.65th	v4 (v2025.03.14)
Mar 29, 2025	80.88% (0.80882)	98.90th	v4 (v2025.03.14)
Mar 17, 2025	51.22% (0.51223)	97.61th	v4 (v2025.03.14)
Dec 17, 2024	89.68% (0.89678)	99.02th	v3 (v2023.03.01)
Nov 29, 2024	77.73% (0.77726)	98.34th	v3 (v2023.03.01)
Oct 24, 2024	81.20% (0.81200)	98.43th	v3 (v2023.03.01)
Aug 29, 2024	77.57% (0.77566)	98.29th	v3 (v2023.03.01)
Jul 30, 2024	79.89% (0.79890)	98.34th	v3 (v2023.03.01)
Jul 3, 2024	83.39% (0.83390)	98.47th	v3 (v2023.03.01)
Jun 9, 2024	83.35% (0.83348)	98.45th	v3 (v2023.03.01)
May 16, 2024	78.76% (0.78757)	98.25th	v3 (v2023.03.01)
Apr 6, 2024	74.92% (0.74923)	98.09th	v3 (v2023.03.01)
Mar 15, 2024	83.94% (0.83942)	98.38th	v3 (v2023.03.01)
Feb 5, 2024	77.80% (0.77803)	97.98th	v3 (v2023.03.01)
Jan 18, 2024	81.94% (0.81938)	98.11th	v3 (v2023.03.01)
Dec 31, 2023	80.70% (0.80703)	98.04th	v3 (v2023.03.01)
Dec 12, 2023	75.68% (0.75678)	97.87th	v3 (v2023.03.01)
Nov 25, 2023	75.52% (0.75518)	97.86th	v3 (v2023.03.01)
Nov 7, 2023	76.78% (0.76785)	97.86th	v3 (v2023.03.01)
Oct 23, 2023	76.67% (0.76672)	97.84th	v3 (v2023.03.01)
Oct 5, 2023	77.73% (0.77732)	97.85th	v3 (v2023.03.01)
Sep 19, 2023	78.00% (0.78002)	97.85th	v3 (v2023.03.01)
Sep 3, 2023	76.71% (0.76712)	97.79th	v3 (v2023.03.01)
Aug 14, 2023	77.83% (0.77825)	97.81th	v3 (v2023.03.01)
Jul 11, 2023	76.43% (0.76431)	97.74th	v3 (v2023.03.01)
Jul 8, 2023	80.81% (0.80805)	97.86th	v3 (v2023.03.01)
Jun 9, 2023	81.85% (0.81848)	97.88th	v3 (v2023.03.01)
May 27, 2023	80.12% (0.80123)	97.80th	v3 (v2023.03.01)
May 12, 2023	79.32% (0.79320)	97.76th	v3 (v2023.03.01)
Apr 11, 2023	77.10% (0.77102)	97.67th	v3 (v2023.03.01)
Mar 27, 2023	79.12% (0.79123)	97.71th	v3 (v2023.03.01)
Mar 9, 2023	74.38% (0.74375)	97.54th	v3 (v2023.03.01)
Mar 7, 2023	69.14% (0.69137)	97.39th	v3 (v2023.03.01)
Mar 6, 2023	65.08% (0.65075)	99.03th	v2 (v2022.01.01)
Feb 4, 2022	62.82% (0.62818)	98.72th	v2 (v2022.01.01)
Feb 3, 2022	26.00% (0.25999)	95.65th	v1
Jan 6, 2022	26.00% (0.25999)	95.60th	v1
Sep 1, 2021	26.00% (0.25999)	98.31th	v1
Apr 14, 2021	26.00% (0.25999)	0.00th	v1

Weaknesses (1)

CWE-119

Buffer Overflow

References (3)

http://www.securityfocus.com/bid/105786
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8552
x_refsource_CONFIRMPatchVendor Advisory
https://www.exploit-db.com/exploits/45924/
exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry

Link	Providers	Tags
http://www.securityfocus.com/bid/105786		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8552		x_refsource_CONFIRMPatchVendor Advisory
https://www.exploit-db.com/exploits/45924/		exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published Nov 14, 2018

Updated Aug 5, 2024

Reserved Mar 14, 2018

Link CVE-2018-8552

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-8552

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-8552