Is CVE-2025-14330 in the CISA KEV catalog?

No. CVE-2025-14330 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-14330?

CVE-2025-14330 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2025-14330?

CVE-2025-14330 has an EPSS score of 0.42% (34th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2025-14330

CRITICAL

9.8

CVSS v3

NVD

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CWE-119Buffer Overflow CWE-686 CWE-843Type Confusion

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.42%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.