CVE-2024-3855
Medium
Published: 16 April 2024
Published
16 April 2024
Modified
31 March 2025
KEV Added
—
Patch
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CVSS Score v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS Score
0.0016
37.4th percentile
Risk Priority
13
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2024-3855 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Mozilla Firefox. Its CVSS base score is 6.5 (Medium).
Operationally, ranked at the 37.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-32423
Vulnerability details
In certain cases the JIT incorrectly optimized MSubstr operations, which led to out-of-bounds reads. This vulnerability affects Firefox < 125.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mozilla
firefox
≤ 125.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.