CVE-2012-1939: n/a vulnerability

CVE-2012-1939: jsinfer.cpp in Mozilla Firefox ESR 10.x before 10.0.5 and Thunderbird ESR 10.x before 10.0.5 does not prope...

jsinfer.cpp in Mozilla Firefox ESR 10.x before 10.0.5 and Thunderbird ESR 10.x before 10.0.5 does not properly determine data types, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via crafted JavaScript code.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 19:17 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2012-1939 is an old Mozilla JavaScript engine memory corruption flaw. A malicious web page or content using crafted JavaScript could crash Firefox ESR or Thunderbird ESR and may allow arbitrary code execution. The known affected versions are Firefox ESR 10.x and Thunderbird ESR 10.x before 10.0.5. Exposure is most likely limited to legacy environments still running Firefox ESR 10.x or Thunderbird ESR 10.x before 10.0.5, including old Linux distribution packages referenced by Debian, Red Hat, SUSE, and Mandriva advisories. Treat as high priority only if legacy Mozilla ESR 10.x software remains in use. For modern supported browsers and mail clients, business urgency is likely low, but any confirmed vulnerable legacy endpoint should be remediated or retired promptly. Mitigation focus: Upgrade Firefox ESR and Thunderbird ESR to 10.0.5 or later where applicable.; Apply relevant distribution security updates from Debian, Red Hat, SUSE, or Mandriva advisories.; Retire unsupported Firefox ESR 10.x and Thunderbird ESR 10.x installations..

Prepared: Jun 24, 2026, 12:34 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-2012-1939 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 5, 2012, 23:00 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

2Source 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=748613CVE 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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