CVE-2010-1988: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 6.4% chance of exploitation in the next 30 days.

Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or possibly execute arbitrary code via JavaScript code that performs certain string concatenation and substring operations, a different vulnerability than CVE-2009-1571.

Affected products

• Mozilla Firefox: version 3.6.3 only

Published 2010-05-20. Last modified 2026-06-16.