Evidence dossier

CVE-2010-3765

CVE-2010-3765

81.5–97.8Priority evidence range

As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State: PUBLISHED
Published: Oct 27, 2010
Updated: Oct 22, 2025
Evidence coverage: 72%

CISA KEVCatalog member

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

FIRST EPSS83.28%

2026-07-18 · v2026.06.15 · percentile 99.6%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment

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CISA ADP Vulnrichment

Jul 19, 2026Original evidence ↗

CVEderivative copy

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CVE Program Container

Jul 19, 2026Original evidence ↗

mitreoriginal assertion

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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.

Jul 19, 2026Original evidence ↗

CISA KEVoriginal assertion

observed_exploitation

Mozilla Multiple Products Remote Code Execution Vulnerability

Jul 19, 2026Original evidence ↗

FIRST EPSSoriginal assertion

model_probability

Probability 0.832790000000; percentile 0.996460000000

Jul 19, 2026Original evidence ↗

Applicability

Cited product scope

Trace impact →

n/an/a

[{"status": "affected", "version": "n/a"}]unknown

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.10:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.11:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.12:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.13:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.14:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.5:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.6:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.7:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.5.9:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.10:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.11:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.6:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.7:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:firefox:3.6.9:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.3:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.5:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.6:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.7:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0.9:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:alpha_1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:alpha_2:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:alpha_3:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:beta_1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:beta_2:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:rc1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:seamonkey:2.0:rc2:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.3:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.5:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.6:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.7:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.0.9:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.1.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.1.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.1.3:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.1.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:mozilla:thunderbird:3.1.5:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

9.3

nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:M/Au:N/C:C/I:C/A:C

9.8

134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8

CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

KEV membership is authoritative for the catalog, not proof of exposure in any environment.
EPSS is a dated model probability and not an individual-environment prediction.
Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
NVD-carried upstream facts remain derivative and are not independent corroboration.
Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.