CVE-2012-4214: n/a vulnerability

CVE-2012-4214: Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17....

Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors, a different vulnerability than CVE-2012-5840.

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

Security readout for executives and security teams

CVE-2012-4214 is a legacy Mozilla memory-safety flaw. A remote attacker could cause heap memory corruption in vulnerable Firefox, Thunderbird, or SeaMonkey versions, potentially leading to application crash or arbitrary code execution. The main business risk is old desktop or server images still running unsupported Mozilla packages. Exposure is most likely on legacy systems, frozen images, or unsupported Linux distributions retaining vulnerable Mozilla browser or mail-client packages. Current, patched installations should not be affected based on the listed fixed versions. Prioritize remediation if any legacy Mozilla clients remain in production or privileged desktop environments. For modern managed fleets, urgency is mainly verification and cleanup of stale assets rather than emergency response. Mitigation focus: Upgrade Firefox, Thunderbird, and SeaMonkey to fixed or vendor-supported versions.; Apply relevant OS vendor advisories for packaged Mozilla builds.; Remove unsupported legacy Mozilla clients from endpoints and server images..

Prepared: Jun 24, 2026, 12:04 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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Execution behavior lookup

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CVE-2012-4214 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 21, 2012, 11:00 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

4Source 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=795804CVE reference · x_refsource_CONFIRM
firefox-nstexteditorstate-code-exec(80187)CVE reference · vdb-entry, x_refsource_XF
oval:org.mitre.oval:def:16884CVE 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

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.