Security readout for executives and security teams
CVE-2016-5291 is an old Mozilla browser and mail-client flaw that could bypass same-origin protections through local shortcut files and load local disk content. The main business risk is exposure of sensitive files on endpoints running outdated Firefox, Firefox ESR, or Thunderbird versions. Exposure is most likely on legacy desktops, kiosks, packaged application runtimes, or unmanaged systems still running the affected Mozilla versions. Fully patched modern Mozilla deployments are unlikely to be exposed based on the listed version bounds. Treat as a legacy endpoint hygiene issue unless affected versions are still present. Prioritize remediation where old Mozilla clients can access sensitive local files or operate on shared, kiosk, or administrative workstations. 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..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2016-5291 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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=1292159CVE 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
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.