CVE-2021-43220

FAUCET Score

CVE-2021-43220 describes a spoofing vulnerability in Microsoft Edge for iOS. This high-severity flaw (CVSS 7.5) allows an unauthenticated attacker to achieve high integrity impact over a network with low attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 96.0.1054.29CPE matchmatch criteria	cpe:2.3:a:microsoft:edge_ios::::::::

CVSS Data

CVSS version used by this source: 3.1

3.1LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

1.6

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

1.12%

Probability of exploitation in next 30 days

EPSS Percentile

63.0%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0112 is in the 41st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference

View patch

microsoftpatch availablevia msrc

Product: Microsoft Edge for iOSFixed in: 96.0 1954.29

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-43220Moderate

Microsoft Edge for iOS Spoofing Vulnerability

Nov 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-43220

PatchVendor Advisory