CVE-2016-5289: Mozilla Firefox vulnerability

CVE-2016-5289: Memory safety bugs were reported in Firefox 49.

Memory safety bugs were reported in Firefox 49. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 50.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 00:53 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-5289 covers Mozilla Firefox memory safety bugs reported in Firefox 49. Mozilla states some showed memory corruption and could likely be exploited with enough effort to run arbitrary code. The exposed population is Firefox versions earlier than 50. Exposure is likely limited to systems still running Firefox versions earlier than 50, including unmanaged endpoints, legacy images, kiosks, or old offline systems. Supported modern Firefox versions should not be exposed to this CVE. Treat this as high priority only where legacy Firefox remains in use. The business risk is outdated browser exposure with potential arbitrary code execution, not a currently documented exploitation campaign in the provided sources. Mitigation focus: Update Firefox to version 50 or later, preferably the current supported release.; Remove or block Firefox versions earlier than 50 from managed endpoints.; Check Mozilla MFSA 2016-89 and vendor package channels for fixed builds..

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

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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

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
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1296649%2C1298107%2C1300129%2C1305876%2C1314667%2C1301252%2C1277866%2C1307254%2C1252511%2C1264053CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2016-89/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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