CVE-2017-5401: Mozilla Firefox vulnerability

CVE-2017-5401: A crash triggerable by web content in which an "ErrorResult" references unassigned memory due to a logic er...

A crash triggerable by web content in which an "ErrorResult" references unassigned memory due to a logic error. The resulting crash may be exploitable. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 14:55 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-5401 is a Mozilla memory-handling flaw where specially crafted web content can crash affected Firefox, Firefox ESR, or Thunderbird versions. Mozilla says the crash may be exploitable, so obsolete browser and mail-client installations should be treated as business-relevant exposure even though no active exploitation is cited in the supplied sources. Exposure is most likely on legacy endpoints, servers, kiosks, or embedded workflows still running pre-52 Firefox/Thunderbird or pre-45.8 ESR-era builds from Mozilla or Linux distribution packages. Prioritize remediation where affected clients can browse the web, open HTML email, or process untrusted content. The strongest concern is legacy software exposure, not confirmed active exploitation. Mitigation focus: Upgrade affected Mozilla products to fixed or vendor-supported versions.; Apply relevant Mozilla, Red Hat, Debian, or Gentoo security updates.; Retire unsupported Firefox, Firefox ESR, and Thunderbird installations..

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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CVE-2017-5401 mapping review

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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

10Source 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://www.mozilla.org/security/advisories/mfsa2017-09/CVE reference · x_refsource_CONFIRM
DSA-3832CVE reference · vendor-advisory, x_refsource_DEBIAN
https://www.mozilla.org/security/advisories/mfsa2017-07/CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-05/CVE reference · x_refsource_CONFIRM
https://bugzilla.mozilla.org/show_bug.cgi?id=1328861CVE reference · x_refsource_CONFIRM
GLSA-201705-06CVE reference · vendor-advisory, x_refsource_GENTOO
DSA-3805CVE reference · vendor-advisory, x_refsource_DEBIAN
https://www.mozilla.org/security/advisories/mfsa2017-06/CVE reference · x_refsource_CONFIRM
GLSA-201705-07CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

MozillaFirefox ESRunspecifiedListed

MozillaThunderbirdunspecified, unspecifiedListed

Weakness

CWE details

No CWE listed

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