CVE-2014-1559: n/a vulnerability

CVE-2014-1559: Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service...

Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use UTF-8 character encoding in a required context, a different vulnerability than CVE-2014-1558.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 09:42 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2014-1559 is an old Mozilla issue where malformed certificate data could make vulnerable Firefox or Thunderbird versions stop handling certificate parsing correctly, causing denial of service. The source bundle names Firefox before 31.0 and Thunderbird before 31.0 only. Exposure is likely limited to legacy installations of Firefox or Thunderbird older than 31.0. The provided sources do not confirm other affected products, despite downstream advisory references. Treat as a legacy hygiene issue unless old Mozilla clients remain in use. Prioritize remediation where certificate-processing denial of service could disrupt business workflows or expose unsupported software risk. Mitigation focus: Upgrade Firefox and Thunderbird to version 31.0 or later.; Prefer current vendor-supported releases over legacy 31.x-era builds.; Check downstream vendor advisories for packaged or embedded Mozilla components..

Prepared: Jun 14, 2026, 07:14 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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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 23, 2014, 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
GLSA-201504-01CVE reference · vendor-advisory, x_refsource_GENTOO
https://bugzilla.mozilla.org/show_bug.cgi?id=1026022CVE 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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