How severe is CVE-2021-26437?

CVE-2021-26437 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-26437 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26437?

CVE-2021-26437 affects Microsoft Visual Studio Code. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26437?

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

When was CVE-2021-26437 published?

CVE-2021-26437 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-26437

CVE-2021-26437 is a medium-severity vulnerability in Microsoft Visual Studio Code with a CVSS 3.x base score of 5.5. 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 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Visual Studio Code
Published: 2021-09-15
Last modified: 2026-06-17

Description

Visual Studio Code Spoofing Vulnerability

Frequently asked questions

What is CVE-2021-26437?: Visual Studio Code Spoofing Vulnerability
How severe is CVE-2021-26437?: CVE-2021-26437 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-26437 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26437?: CVE-2021-26437 affects Microsoft Visual Studio Code. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26437?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26437 published?: CVE-2021-26437 was published on 2021-09-15 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26437

Affected products (1)

cpe:2.3:a:microsoft:visual_studio_code:-:*:*:*:*:*:*:*

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