Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since October 6, 2025.
CVE-2010-3765
Mozilla Multiple Products Remote Code Execution Vulnerability
Added to KEV October 6, 2025
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2010-3765
- Affected products
- Multiple Products · Mozilla Multiple Products · Mozilla
What happened
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.
What it means for your business
Mozilla Multiple Products is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2010-3765). 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. CISA remediation due date: 2025-10-27. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: October 27, 2025
Sources
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