Is CVE-2024-7521 in the CISA KEV catalog?

No. CVE-2024-7521 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-7521?

CVE-2024-7521 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2024-7521?

CVE-2024-7521 has an EPSS score of 0.58% (44th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-7521?

Upgrade firefox on debian unstable to 129.0-1 or later. Fixes are available for 21 affected products.

CVE & CISA-KEV Catalog

CVE-2024-7521

HIGH

8.8

CVSS v3

NVD

Description

Incomplete WebAssembly exception handing could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

CWE-755

How to fix

Remediation Available

firefoxDebian

Fixed in:129.0-1CVE-2024-7521

firefoxRocky

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9.ppc64RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

firefoxRed Hat / RHEL

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9.ppc64RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

firefox-debuginfoRocky

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9.ppc64RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

firefox-debuginfoRed Hat / RHEL

Fixed in:0:115.14.0-2.el7_9.ppc64RHSA-2024:5324

Fixed in:0:115.14.0-2.el7_9RHSA-2024:5324

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

firefox-debugsourceRed Hat / RHEL

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

firefox-debugsourceRocky

Fixed in:0:115.14.0-2.el8_8RHSA-2024:5329

Fixed in:0:115.14.0-2.el8_6RHSA-2024:5326

Fixed in:0:115.14.0-2.el8_10RHSA-2024:5391

Fixed in:0:115.14.0-2.el8_2RHSA-2024:5323

Fixed in:0:115.14.0-2.el8_4RHSA-2024:5325

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_0RHSA-2024:5327

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

firefox-x11Rocky

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

firefox-x11Red Hat / RHEL

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

Fixed in:0:115.14.0-2.el9_4RHSA-2024:5322

Fixed in:0:115.14.0-2.el9_2RHSA-2024:5328

thunderbirdRed Hat / RHEL

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

thunderbirdRocky

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

thunderbird-debuginfoRocky

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

thunderbird-debugsourceRocky

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_2RHSA-2024:5393

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_10RHSA-2024:5402

Fixed in:0:115.14.0-1.el8_4RHSA-2024:5527

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el8_6RHSA-2024:5528

Fixed in:0:115.14.0-1.el8_8RHSA-2024:5394

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_4RHSA-2024:5392

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

Fixed in:0:115.14.0-1.el9_2RHSA-2024:5396

Fixed in:0:115.14.0-1.el9_0RHSA-2024:5395

firefoxUbuntu

Fixed in:129.0.1+build1-0ubuntu0.20.04.1USN-6966-1

thunderbirdUbuntu

Fixed in:1:115.15.0+build1-0ubuntu0.20.04.1USN-6995-1

Fixed in:1:115.15.0+build1-0ubuntu0.22.04.1USN-6995-1

DeveloperEditionWindows application

Affected:129.0Fixed in:129.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:129.0Fixed in:129.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:115.14.0Fixed in:115.14.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:115.14.0Fixed in:115.14.0Mozilla

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

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.58%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Vendor Advisory5

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-755 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-5638	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-7247	Critical	9.8	99%	KEV	Fix
CVE-2023-36933	High	7.5	72%	-	Fix
CVE-2018-0934	High	7.5	66%	-	Fix
CVE-2019-14287	High	8.8	64%	-	Fix
CVE-2019-12815	Critical	9.8	58%	-	Fix

Embed a live status badge for CVE-2024-7521

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 2024-08-12.