CVE-2021-43220

mediumpriority · track · 20EPSS 0.013 · 71 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.34% (71st) EPSS

CVSS 5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-28

Microsoft Edge for iOS Spoofing Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Edge for iOSmsrc_csaf
96.0 1954.29:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.1–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:P/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · secure@microsoft.com USexploitability 1.6 · impact 1.4

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:Csecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · NVD / NIST USexploitability 3.9 · impact 3.6

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-290USprimaryCWE-290US

affected products (5)

Products and version ranges known to be affected.

Microsoft Microsoft Edge for iOS1.0.0.0 → 96.0 1954.29enisa_euvdEU
Microsoft Corp Microsoft Edge≤ 96.0.1054.29fstec_bduRU
Microsoft Edge for iOSall versionsfixedmsrc_csafUS
Microsoft Edge for iOS< 96.0 1954.29msrc_csafUS
microsoft edge ios< 96.0.1054.29nvdUScpe:2.3:a:microsoft:edge_ios:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2021-43220Microsoft Edge for iOS Spoofing Vulnerability2021-11-19csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf nvd NVD CVE.org MITRE

published 2021-11-24modified 2026-08-19

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references (9)

External citations — patches, advisories, analysis.

scry

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