How severe is CVE-2021-26436?

CVE-2021-26436 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-26436 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26436?

CVE-2021-26436 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26436?

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

When was CVE-2021-26436 published?

CVE-2021-26436 was published on 2021-09-02 and last updated on 2026-06-17.

CVE-2021-26436

CVE-2021-26436 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 6.8
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Edge
Published: 2021-09-02
Last modified: 2026-06-17

Description

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2021-26436?: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
How severe is CVE-2021-26436?: CVE-2021-26436 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-26436 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26436?: CVE-2021-26436 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26436?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26436 published?: CVE-2021-26436 was published on 2021-09-02 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26436

Affected products (1)

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

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