How severe is CVE-2021-43214?

CVE-2021-43214 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43214 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43214?

CVE-2021-43214 affects Microsoft Raw Image Extension. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43214?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43214 published?

CVE-2021-43214 was published on 2021-12-15 and last updated on 2026-06-17.

CVE-2021-43214

CVE-2021-43214 is a high-severity vulnerability in Microsoft Raw Image Extension with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Raw Image Extension
Published: 2021-12-15
Last modified: 2026-06-17

Description

Web Media Extensions Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2021-43214?: Web Media Extensions Remote Code Execution Vulnerability
How severe is CVE-2021-43214?: CVE-2021-43214 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43214 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43214?: CVE-2021-43214 affects Microsoft Raw Image Extension. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43214?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43214 published?: CVE-2021-43214 was published on 2021-12-15 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43214

Affected products (1)

cpe:2.3:a:microsoft:raw_image_extension:*:*:*:*:*:*:*:*

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