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CVE Record

CVE-2012-1940: Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, F...

Use-after-free vulnerability in the nsFrameList::FirstChild function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by changing the size of a container of absolutely positioned elements in a column.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw affects old Mozilla browser and mail products. A malicious page or rendered message could corrupt memory, crash the application, or potentially run code. The business risk is mainly from legacy systems still using Firefox, Thunderbird, SeaMonkey, or distro packages from the 2012 affected ranges. Exposure is unlikely on modern managed endpoints, but possible in legacy desktops, embedded kiosks, old Linux distributions, or archived virtual machines running affected Mozilla packages. Thunderbird exposure depends on rendering untrusted message content or related browser-engine paths. Prioritize this where legacy Mozilla software remains in production or can browse untrusted content. For current supported endpoints, urgency is lower, but this is a strong signal to eliminate unsupported browser and mail-client versions. Mitigation focus: Remove or upgrade affected Mozilla products beyond the listed vulnerable versions.; Apply the relevant Mozilla or operating-system vendor security updates.; Retire legacy systems that cannot receive supported browser or mail-client updates..

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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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Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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CVE-2012-1940 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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

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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