KEV · Actively exploited
CVE-2010-3765
CRITICAL 9.8
KEV
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.
Attack vector : Network
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
86.77%
exploit likely
percentile 99.4%
CISA Known Exploited Vulnerability
- Added to KEV
- 2025-10-06
- Remediation deadline
- 2025-10-27
- 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.
- Ransomware
- No
Tracked apps referencing this CVE
For each app: the affected range, the fixing version, and where the tracked app stands today.
Vulnerable CPE configurations (14)
| Vendor | Product | Platform | Versions | CPE 2.3 URI |
|---|---|---|---|---|
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.1:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.2:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.3:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.4:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.5:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.6:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.7:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.8:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.0.9:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.1.1:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.1.2:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.1.3:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.1.4:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | — | cpe:2.3:a:mozilla:thunderbird:3.1.5:*:*:*:*:*:*:* |