How severe is CVE-2021-43220?

CVE-2021-43220 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-43220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43220?

CVE-2021-43220 affects Microsoft Edge Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43220 published?

CVE-2021-43220 was published on 2021-11-24 and last updated on 2026-06-17.

CVE-2021-43220

CVE-2021-43220 is a low-severity vulnerability in Microsoft Edge Ios with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-290.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Microsoft Edge Ios
Published: 2021-11-24
Last modified: 2026-06-17

Description

Microsoft Edge for iOS Spoofing Vulnerability

Frequently asked questions

What is CVE-2021-43220?: Microsoft Edge for iOS Spoofing Vulnerability
How severe is CVE-2021-43220?: CVE-2021-43220 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-43220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43220?: CVE-2021-43220 affects Microsoft Edge Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43220 published?: CVE-2021-43220 was published on 2021-11-24 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:microsoft:edge_ios:*:*:*:*:*:*:*:*

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