CVE-2012-3958: n/a vulnerability

CVE-2012-3958: Use-after-free vulnerability in the nsHTMLEditRules::DeleteNonTableElements function in Mozilla Firefox bef...

Use-after-free vulnerability in the nsHTMLEditRules::DeleteNonTableElements function in 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 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

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 memory-safety vulnerability that could let a remote attacker crash affected software or run code through unspecified content. The affected software is Firefox, Thunderbird, and SeaMonkey versions from before the 2012 fixed releases. Modern, supported versions should not be exposed, but legacy systems remain a concern. Exposure is most likely on legacy endpoints, old gold images, unsupported Linux distributions, or embedded/vendor-maintained systems still carrying the listed Mozilla application versions or distro backports. Treat this as high priority only where legacy Mozilla software remains in production. For current supported builds, urgency is mainly asset-confirmation and cleanup rather than emergency response. Mitigation focus: Upgrade Firefox, Thunderbird, and SeaMonkey to the fixed versions or later.; Apply relevant Red Hat, Ubuntu, or SUSE security updates where distro packages are used.; Remove unsupported legacy Mozilla applications from managed endpoints..

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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Execution behavior lookup

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CVE-2012-3958 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:16782CVE reference · vdb-entry, signature
https://bugzilla.mozilla.org/show_bug.cgi?id=772346CVE 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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