How severe is CVE-2024-4771?

CVE-2024-4771 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2024-4771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-4771?

CVE-2024-4771 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-4771?

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.

Does CVE-2024-4771 have an EU (EUVD) identifier?

Yes. CVE-2024-4771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-44365.

When was CVE-2024-4771 published?

CVE-2024-4771 was published on 2024-05-14 and last updated on 2026-06-17.

CVE-2024-4771

CVE-2024-4771 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-44365
Weakness: CWE-416
Affected product: Mozilla Firefox
Published: 2024-05-14
Last modified: 2026-06-17

Description

A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.

Frequently asked questions

What is CVE-2024-4771?: A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.
How severe is CVE-2024-4771?: CVE-2024-4771 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2024-4771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-4771?: CVE-2024-4771 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-4771?: 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.
Does CVE-2024-4771 have an EU (EUVD) identifier?: Yes. CVE-2024-4771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-44365.
When was CVE-2024-4771 published?: CVE-2024-4771 was published on 2024-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

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