CRITICAL🚩 CISA KEV⚡ EXPLOIT🇵🇱 Wersja polska

CVE-2010-3765

CVSS 9.8v3.1pub. 2010-10-28upd. 2026-04-22

Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, 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, as exploited in the wild in October 2010 by the Belmoo malware.

🇵🇱 Read Polish description →

CVSS Vector

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

Mozilla Firefox
APP
Mozilla
3.53.5.13.5.103.5.113.5.123.5.133.5.143.5.23.5.33.5.43.5.53.5.63.5.73.5.83.5.9+ 10 more
Mozilla Seamonkey
APP
Mozilla
2.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.9
Mozilla Thunderbird
APP
Mozilla
3.0.13.0.23.0.33.0.43.0.53.0.63.0.73.0.83.0.93.1.13.1.23.1.33.1.43.1.5

CISA KEV — detailsi

Vendori: Mozilla ↗
Producti: Multiple Products
Added to KEVi: October 6, 2025
Remediation deadline (US Federal)i: October 27, 2025(overdue)

🔧Advisory Mozilla↗🇺🇸CISA KEV (original)↗

Required action (CISA)i

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 descriptioni

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.

🔴