OnlyFm252
Microsoft Edge (Chromium-based) in IE Mode

CVE-2020-1220 — Microsoft Edge (Chromium-based) in IE Mode Spoofing Vulnerability

Important CVSS 6.1 EPSS 0.01811 2020-06 archive

Executive Summary

A spoofing vulnerability exists when theMicrosoft Edge (Chromium-based) in IE Mode improperly handles specific redirects. An attacker who successfully exploits the IE Mode vulnerability could trick a user into believing that the user was on a legitimate website. The specially crafted website could either spoof content or serve as a pivot to chain an attack with other vulnerabilities in web services. To exploit the vulnerability, the user must either browse to a malicious website that has the IE Mode or be redirected to it. In an email attack scenario, an attacker could send an email message in an attempt to convince the user to click a link to a malicious site. In a web-based attack scenario, an attacker could host a specially crafted website designed to appear as a legitimate website to the user. However, the attacker would have no way to force the user to visit the specially crafted website. The attacker would have to convince the user to visit the specially crafted website, typically by way of enticement in an email or instant message. The security update addresses the vulnerability by correcting how IE Mode handles specific redirects on Microsoft Edge (Chromium-based).

Overview

6.1
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Spoofing
Released Jun 9 2020
Last Updated Jun 9 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01811 — 0.75796 percentile
NVD CVSS 6.1 MEDIUM — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Changed
CONFIDENTIALITY
Low
INTEGRITY
Low
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.9

EPSS Score

0.01811
probability of exploitation in the next 30 days
0.75796 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

24 affected products
Product KB Article Severity Impact Restart Required
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 for 32-bit Systems 4561649 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 for x64-based Systems 4561649 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1607 for 32-bit Systems 4561616 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1607 for x64-based Systems 4561616 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1709 for 32-bit Systems 4561602 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1709 for ARM64-based Systems 4561602 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1709 for x64-based Systems 4561602 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1803 for 32-bit Systems 4561621 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1803 for ARM64-based Systems 4561621 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1803 for x64-based Systems 4561621 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for 32-bit Systems 4561608 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for ARM64-based Systems 4561608 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1809 for x64-based Systems 4561608 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1903 for 32-bit Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1903 for ARM64-based Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1903 for x64-based Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1909 for 32-bit Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1909 for ARM64-based Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 1909 for x64-based Systems 4560960 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 2004 for 32-bit Systems 4557957 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 2004 for ARM64-based Systems 4557957 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 10 Version 2004 for x64-based Systems 4557957 (Security Update) Important Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows 7 for 32-bit Systems Service Pack 1 4561603 (IE Cumulative) 4561643 (Monthly Rollup) Important Spoofing 4556798 4556836 Base: 5.4 Temporal: 4.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes 4561643 Microsoft Edge (Chromium-based) in IE Mode on Windows 7 for x64-based Systems Service Pack 1 4561603 (IE Cumulative) 4561643 (Monthly Rollup) Important Spoofing 4556798 4556836 Base: 5.4 Temporal: 4.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes 4561643 Microsoft Edge (Chromium-based) in IE Mode on Windows 8.1 for 32-bit systems 4561666 (Monthly Rollup) 4561603 (IE Cumulative) 4561666 (Monthly Rollup) Important Spoofing 4556846 4556798 Base: 5.4 Temporal: 4.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes None Microsoft Edge (Chromium-based) in IE Mode on Windows 8.1 for x64-based systems 4561666 (Monthly Rollup) 4561603 (IE Cumulative) 4561666 (Monthly Rollup) Important Spoofing 4556846 4556798 Base: 5.4 Temporal: 4.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes None Microsoft Edge (Chromium-based) in IE Mode on Windows RT 8.1 4561666 (Monthly Rollup) 4561666 (Monthly Rollup) Important Spoofing 4556846 Base: 5.4 Temporal: 4.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes None Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4561603 (IE Cumulative) 4561643 (Monthly Rollup) Low Spoofing 4556798 4556836 Base: 3.5 Temporal: 3.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes 4561643 Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2012 4561603 (IE Cumulative) 4561612 (Monthly Rollup) Low Spoofing 4556798 4556840 Base: 3.5 Temporal: 3.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes None Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2012 R2 4561666 (Monthly Rollup) 4561603 (IE Cumulative) 4561666 (Monthly Rollup) Low Spoofing 4556846 4556798 Base: 3.5 Temporal: 3.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C Yes None Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2016 4561616 (Security Update) Low Spoofing Yes
Microsoft Edge (Chromium-based) in IE Mode on Windows Server 2019 4561608 (Security Update) Low Spoofing Yes

Patches

7 patches
Article Type Restart
4561649 Security Update Yes
4561616 Security Update Yes
4561602 Security Update Yes
4561621 Security Update Yes
4561608 Security Update Yes
4560960 Security Update Yes
4557957 Security Update Yes

Known Exploits

Acknowledgments

None

On This Page