OnlyFm252
Microsoft Scripting Engine

CVE-2020-0968 — Scripting Engine Memory Corruption Vulnerability

Moderate CVSS 7.5 EPSS 0.30018 2020-04 archive

Executive Summary

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

Overview

7.5
CVSS HIGH
Moderate
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Apr 14 2020
Last Updated Apr 14 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.30018 — 0.97968 percentile
NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Functional
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.0

EPSS Score

0.30018
probability of exploitation in the next 30 days
0.97968 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

22 affected products
Product KB Article Severity Impact Restart Required
Internet Explorer 11 on Windows 10 for 32-bit Systems 4550930 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 for x64-based Systems 4550930 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems 4550929 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems 4550929 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems 4550927 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1709 for ARM64-based Systems 4550927 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems 4550927 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems 4550922 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems 4550922 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems 4550922 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems 4549949 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems 4549949 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems 4549949 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1909 for 32-bit Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1909 for ARM64-based Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 10 Version 1909 for x64-based Systems 4549951 (Security Update) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 4550905 (IE Cumulative) 4550964 (Monthly Rollup) Critical Remote Code Execution 4540671 4540688 Base: 7.5 Temporal: 7.0 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550964 Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 4550905 (IE Cumulative) 4550964 (Monthly Rollup) Critical Remote Code Execution 4540671 4540688 Base: 7.5 Temporal: 7.0 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550964 Internet Explorer 11 on Windows 8.1 for 32-bit systems 4550905 (IE Cumulative) 4550961 (Monthly Rollup) Critical Remote Code Execution 4540671 4541509 Base: 7.5 Temporal: 7.0 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550961 Internet Explorer 11 on Windows 8.1 for x64-based systems 4550905 (IE Cumulative) 4550961 (Monthly Rollup) Critical Remote Code Execution 4540671 4541509 Base: 7.5 Temporal: 7.0 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550961 Internet Explorer 11 on Windows RT 8.1 4550961 (Monthly Rollup) Critical Remote Code Execution Yes
Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4550905 (IE Cumulative) 4550964 (Monthly Rollup) Moderate Remote Code Execution 4540671 4540688 Base: 6.4 Temporal: 5.9 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550964 Internet Explorer 11 on Windows Server 2012 4550905 (IE Cumulative) 4550917 (Monthly Rollup) Moderate Remote Code Execution 4540671 4541510 Base: 6.4 Temporal: 5.9 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550917 Internet Explorer 11 on Windows Server 2012 R2 4550905 (IE Cumulative) 4550961 (Monthly Rollup) Moderate Remote Code Execution 4540671 4541509 Base: 6.4 Temporal: 5.9 Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Yes 4550905 4550961 Internet Explorer 11 on Windows Server 2016 4550929 (Security Update) Moderate Remote Code Execution Yes
Internet Explorer 11 on Windows Server 2019 4549949 (Security Update) Moderate Remote Code Execution Yes

Patches

7 patches
Article Type Restart
4550930 Security Update Yes
4550929 Security Update Yes
4550927 Security Update Yes
4550922 Security Update Yes
4549949 Security Update Yes
4549951 Security Update Yes
4550961 Monthly Rollup Yes

Known Exploits

Acknowledgments

None

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