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TI-2016-04589 Aliases CVE-2016-5293GHSA-4m4x-qm8m-cxqj

Improper input validation in Mozilla Firefox ESR

Priority LOW 25CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

When the Mozilla Updater is run, if the Updater's log file in the working directory points to a hardlink, data can be appended to an arbitrary local file. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Firefox ESR < 45.5 and Firefox < 50.

Why it matters now

EPSS 0.00329 26th percentileScored 2026-11-07
Fix Fixed Firefox ESR (Mozilla): 45.5Firefox (Mozilla): 50

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox ESRbefore 45.545.5Patch availableCNA
MozillaFirefoxbefore 5050Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 45.5 Fixed in 45.5 Patch available CNA
  • Firefox VendorMozilla Affected before 50 Fixed in 50 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 45.5.0; before 50.0VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 45.5.0; before 50.0 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 45.5
  • Fix · CNA Firefox (Mozilla) Fixed in 50

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 50

    20 records Highest priority Priority MEDIUM 3 MEDIUM, 17 LOW

    Other records, highest priority first

    • TI-2016-07417 Integer overflow in Mozilla FirefoxPriority MEDIUM 57
    • TI-2016-07429 Access control flaw in Mozilla FirefoxPriority MEDIUM 46
    • TI-2016-04585 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
    Show all 20 records →
  • Release ·

    Mozilla Firefox ESR 45.5

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2016-04590 Improper input validation in Mozilla ThunderbirdPriority LOW 25
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5293
  2. 2026-10-03 Alias added: GHSA-4m4x-qm8m-cxqj

References

Advisory 3

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences