How severe is CVE-2024-21388?

CVE-2024-21388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2024-21388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21388?

CVE-2024-21388 affects Microsoft Edge Chromium. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21388?

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

Does CVE-2024-21388 have an EU (EUVD) identifier?

Yes. CVE-2024-21388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19099.

When was CVE-2024-21388 published?

CVE-2024-21388 was published on 2024-01-30 and last updated on 2026-06-17.

CVE-2024-21388

CVE-2024-21388 is a medium-severity vulnerability in Microsoft Edge Chromium with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 32% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 32% (98th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19099
Weakness: CWE-20
Affected product: Microsoft Edge Chromium
Published: 2024-01-30
Last modified: 2026-06-17

Description

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2024-21388?: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
How severe is CVE-2024-21388?: CVE-2024-21388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2024-21388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21388?: CVE-2024-21388 affects Microsoft Edge Chromium. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21388 have an EU (EUVD) identifier?: Yes. CVE-2024-21388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19099.
When was CVE-2024-21388 published?: CVE-2024-21388 was published on 2024-01-30 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21388

Affected products (1)

cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*

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