CVE-2012-3962: n/a vulnerability

CVE-2012-3962: Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x...

Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 do not properly iterate through the characters in a text run, which allows remote attackers to execute arbitrary code via a crafted document.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Mozilla client-side code execution flaw. A crafted document could trigger arbitrary code execution in affected Firefox, Thunderbird, and SeaMonkey versions. Business urgency is highest where unsupported legacy desktop, server, or embedded systems still run these clients or distro-packaged equivalents. Exposure is likely limited to legacy environments retaining affected Mozilla products or Linux distribution packages from 2012. Modern fully patched systems should not be affected, but old workstations, kiosks, mail clients, and long-lived images warrant checks. Prioritize remediation if legacy Mozilla clients remain in use. The technical impact is serious, but urgency depends on whether affected 2012-era software still exists in the estate. Mitigation focus: Upgrade affected Mozilla products to the fixed versions or later.; Apply relevant Debian, Red Hat, Ubuntu, or SUSE security updates.; Remove unsupported legacy Firefox, Thunderbird, SeaMonkey, or distro packages..

Prepared: Jun 28, 2026, 00:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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CVE-2012-3962 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 29, 2012, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:16494CVE reference · vdb-entry, signature
https://bugzilla.mozilla.org/show_bug.cgi?id=769120CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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