CVE-2012-4187: n/a vulnerability

CVE-2012-4187: Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x...

Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 do not properly manage a certain insPos variable, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and assertion failure) via unspecified vectors.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:28 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Mozilla browser and mail client memory-corruption flaw. A remote attacker could make vulnerable Firefox, Thunderbird, or SeaMonkey crash, and the CVE description says arbitrary code execution is possible. The main business risk is legacy software still present on endpoints, kiosk systems, or embedded workflows. Exposure is most likely where unsupported Mozilla Firefox, Thunderbird, Firefox ESR, Thunderbird ESR, or SeaMonkey builds remain installed. Modern standard patching should have removed this risk, but long-lived desktops, legacy Linux images, offline systems, and old application stacks should be checked. Treat as a legacy hygiene issue with high impact if present. It should not disrupt current operations if patch management is mature, but any confirmed affected installations should be removed or upgraded promptly. Mitigation focus: Upgrade Firefox, Thunderbird, and SeaMonkey beyond the affected versions listed by Mozilla.; Remove unsupported legacy Mozilla products from endpoints and golden images.; Apply relevant Linux vendor security updates where Mozilla packages are OS-managed..

Prepared: Jun 27, 2026, 16:25 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

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Execution behavior lookup

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CVE-2012-4187 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 10, 2012, 17:00 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
https://bugzilla.mozilla.org/show_bug.cgi?id=787493CVE reference · x_refsource_CONFIRM
oval:org.mitre.oval:def:16425CVE reference · vdb-entry, signature

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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