CVE-2010-3765VulnerabilityPublished 10/06/2025Updated 10/24/2026
CVE-2010-3765: Mozilla Multiple Products Remote Code Execution Vulnerability
Affects Mozilla Multiple ProductsSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 10/06/2025
- KEV deadline
- 10/27/2025
- EPSS
- 83.2% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
Mozilla Firefox, SeaMonkey, and Thunderbird contain an unspecified vulnerability when JavaScript is enabled. This allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption.