Is CVE-2025-3032 in the CISA KEV catalog?

No. CVE-2025-3032 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-3032?

CVE-2025-3032 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2025-3032?

CVE-2025-3032 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-3032?

Upgrade firefox on debian unstable to 137.0-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2025-3032

HIGH

7.4

CVSS v3

NVD

Description

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

CWE-403

How to fix

Remediation Available

firefoxDebian

Fixed in:137.0-1CVE-2025-3032

thunderbirdUbuntu

Fixed in:1:140.7.1+build1-0ubuntu0.22.04.1USN-7991-1

DeveloperEditionWindows application

Affected:137.0Fixed in:137.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:137.0Fixed in:137.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:137.0Fixed in:137.0Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Vendor Advisory2

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-403 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21626	High	8.6	18%	-	Fix
CVE-2024-58280	High	8.8	0.8%	-	-
CVE-2025-15114	Critical	9.8	0.5%	-	-
CVE-2026-12296	Critical	9.6	0.4%	-	Fix
CVE-2026-40042	Critical	9.8	0.4%	-	-

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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.