CVE-2024-7521

HIGH

Mozilla Firefox < 129.0 - Improper Exception Handling

Title source: rule

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.

References (6)

[Issue Tracking, Permissions Required] https://bugzilla.mozilla.org/show_bug.cgi?id=1904644

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2024-33/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2024-34/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2024-35/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2024-37/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2024-38/

Scores

CVSS v3 8.8

EPSS 0.0026

EPSS Percentile 49.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-755

Status published

Products (5)

mozilla/firefox < 129.0

mozilla/firefox_esr 128.0

mozilla/firefox_esr < 115.14.0

mozilla/thunderbird 128.0.1

mozilla/thunderbird < 115.14.0

Published Aug 06, 2024

Tracked Since Feb 18, 2026