CVE-2016-9066: Mozilla Thunderbird vulnerability

CVE-2016-9066: A buffer overflow resulting in a potentially exploitable crash due to memory allocation issues when handlin...

A buffer overflow resulting in a potentially exploitable crash due to memory allocation issues when handling large amounts of incoming data. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 02:42 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-9066 is a Mozilla memory-safety issue that could crash Firefox, Firefox ESR, or Thunderbird when processing large incoming data. Mozilla described the crash as potentially exploitable. Business urgency depends on whether any legacy affected versions remain in use. Exposure is mainly legacy workstations, kiosks, embedded browser deployments, or mail clients still running the affected Mozilla versions. Current supported Mozilla releases are likely outside scope, but managed Firefox ESR or old Thunderbird installations should be checked explicitly. Treat this as a legacy software hygiene issue with memory-corruption risk. Prioritize remediation where affected Mozilla clients still process web or email content, especially on managed endpoints with delayed browser or mail-client updates. Mitigation focus: Upgrade Firefox to version 50 or later.; Upgrade Firefox ESR to version 45.5 or later.; Upgrade Thunderbird to version 45.5 or later..

Prepared: Jun 7, 2026, 06:44 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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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 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

7Source 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
DSA-3730CVE reference · vendor-advisory, x_refsource_DEBIAN
https://bugzilla.mozilla.org/show_bug.cgi?id=1299686CVE reference · x_refsource_CONFIRM
GLSA-201701-15CVE reference · vendor-advisory, x_refsource_GENTOO
https://www.mozilla.org/security/advisories/mfsa2016-93/CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2016-89/CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2016-90/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaThunderbirdunspecifiedListed

MozillaFirefox ESRunspecifiedListed

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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