CVE-2012-4191: n/a vulnerability

CVE-2012-4191: The mozilla::net::FailDelayManager::Lookup function in the WebSockets implementation in Mozilla Firefox bef...

The mozilla::net::FailDelayManager::Lookup function in the WebSockets implementation in Mozilla Firefox before 16.0.1, Thunderbird before 16.0.1, and SeaMonkey before 2.13.1 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

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

Security readout for executives and security teams

CVE-2012-4191 is a memory-corruption flaw in the WebSockets code of older Mozilla applications. A remote attacker could crash the application and might execute arbitrary code. The business risk is mainly legacy desktop exposure: modern supported versions should not be affected, but unmanaged old browsers or mail clients deserve attention. Exposure is most likely on endpoints still running the named pre-fix Mozilla versions, including old Linux distributions or unmanaged desktop images. Internet-facing servers are not indicated as affected by the provided sources. Treat this as high priority only if legacy Mozilla clients remain in the environment. For current managed fleets, it is mainly a hygiene and asset-discovery issue rather than an emergency response item. Mitigation focus: Upgrade Firefox to 16.0.1 or later where legacy versions exist.; Upgrade Thunderbird to 16.0.1 or later where legacy versions exist.; Upgrade SeaMonkey to 2.13.1 or later where legacy versions exist..

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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CVE-2012-4191 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 12, 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

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
oval:org.mitre.oval:def:16719CVE reference · vdb-entry, signature
https://bugzilla.mozilla.org/show_bug.cgi?id=798045CVE reference · x_refsource_CONFIRM
mozilla-websockets-code-execution(79209)CVE reference · vdb-entry, x_refsource_XF

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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