CVE-2017-5392: Mozilla Firefox vulnerability

CVE-2017-5392: Weak proxy objects have weak references on multiple threads when they should only have them on one, resulti...

Weak proxy objects have weak references on multiple threads when they should only have them on one, resulting in incorrect memory usage and corruption, which leads to potentially exploitable crashes. Note: This issue only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 51.

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

Security readout for executives and security teams

CVE-2017-5392 is an old Firefox for Android memory corruption issue. Firefox versions before 51 could crash in a potentially exploitable way because weak proxy references were handled incorrectly across threads. Business risk is mainly legacy Android devices running outdated Firefox; other operating systems are stated as unaffected. Exposure is limited to Android devices running Firefox for Android earlier than 51. Desktop Firefox and other operating systems are explicitly described as unaffected in the source bundle. Prioritize remediation if the organization still has unmanaged or legacy Android browsing. For current managed fleets, this is mostly a hygiene and verification item because the affected product version is very old. Mitigation focus: Upgrade Firefox for Android to version 51 or later.; Prefer the latest vendor-supported Firefox for Android release.; Remove or block unsupported Firefox for Android builds from managed devices..

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/show_bug.cgi?id=1293709CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-01/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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