How severe is CVE-2021-41351?

CVE-2021-41351 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-41351 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41351?

CVE-2021-41351 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41351?

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

When was CVE-2021-41351 published?

CVE-2021-41351 was published on 2021-11-10 and last updated on 2026-06-17.

CVE-2021-41351

CVE-2021-41351 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Edge
Published: 2021-11-10
Last modified: 2026-06-17

Description

Microsoft Edge (Chrome based) Spoofing on IE Mode

Frequently asked questions

What is CVE-2021-41351?: Microsoft Edge (Chrome based) Spoofing on IE Mode
How severe is CVE-2021-41351?: CVE-2021-41351 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-41351 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41351?: CVE-2021-41351 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41351?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41351 published?: CVE-2021-41351 was published on 2021-11-10 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41351

Affected products (1)

cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:*

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