Is CVE-2025-9181 in the CISA KEV catalog?

No. CVE-2025-9181 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-9181?

CVE-2025-9181 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-9181?

CVE-2025-9181 has an EPSS score of 0.34% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-9181?

Upgrade firefox on debian unstable to 142.0-1 or later. Fixes are available for 19 affected products.

CVE & CISA-KEV Catalog

CVE-2025-9181

MEDIUM

6.5

CVSS v3

NVD

Description

Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

CWE-457

How to fix

Remediation Available

firefoxDebian

Fixed in:142.0-1CVE-2025-9181

firefoxRed Hat / RHEL

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el7_9RHSA-2025:15430

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

firefoxRocky

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el7_9RHSA-2025:15430

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

firefox-debuginfoRocky

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el7_9RHSA-2025:15430

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

firefox-debuginfoRed Hat / RHEL

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el7_9RHSA-2025:15430

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

firefox-debugsourceRocky

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

firefox-debugsourceRed Hat / RHEL

Fixed in:0:128.14.0-2.el10_0RHSA-2025:14417

Fixed in:0:128.14.0-2.el8_8RHSA-2025:15424

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_4RHSA-2025:15419

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el8_2RHSA-2025:15418

Fixed in:0:128.14.0-2.el8_10RHSA-2025:14442

Fixed in:0:128.14.0-2.el8_6RHSA-2025:15422

Fixed in:0:128.14.0-2.el9_0RHSA-2025:15420

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

firefox-x11Red Hat / RHEL

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

firefox-x11Rocky

Fixed in:0:128.14.0-2.el9_6RHSA-2025:14416

Fixed in:0:128.14.0-2.el9_4RHSA-2025:15423

Fixed in:0:128.14.0-2.el9_2RHSA-2025:15421

thunderbirdRocky

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

thunderbirdRed Hat / RHEL

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

thunderbird-debuginfoRocky

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

thunderbird-debugsourceRocky

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:128.14.0-3.el10_0RHSA-2025:14844

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_4RHSA-2025:15496

Fixed in:0:128.14.0-3.el8_2RHSA-2025:15437

Fixed in:0:128.14.0-3.el8_8RHSA-2025:15438

Fixed in:0:128.14.0-3.el8_10RHSA-2025:14743

Fixed in:0:128.14.0-3.el8_6RHSA-2025:15535

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_6RHSA-2025:14640

Fixed in:0:128.14.0-3.el9_2RHSA-2025:15435

Fixed in:0:128.14.0-3.el9_0RHSA-2025:15436

Fixed in:0:128.14.0-3.el9_4RHSA-2025:15434

thunderbirdUbuntu

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

DeveloperEditionWindows application

Affected:140.0 140.2.0Fixed in:140.2.0Mozilla

Affected:142.0Fixed in:142.0Mozilla

Affected:128.14.0Fixed in:128.14.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:128.14.0Fixed in:128.14.0Mozilla

Affected:142.0Fixed in:142.0Mozilla

Affected:140.0 140.2.0Fixed in:140.2.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:142.0Fixed in:142.0Mozilla

Affected:128.14.0Fixed in:128.14.0Mozilla

Affected:140.0 140.2.0Fixed in:140.2.0Mozilla

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 ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.34%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory6

Issue Tracking1

bugzilla.mozilla.org

Other references2

Embed a live status badge for CVE-2025-9181

Markdown

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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.