What’s Vulnerable › Vulnerabilities

CVE-2016-9066

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 12.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-119

Description

A buffer overflow resulting in a potentially exploitable crash due to memory allocation issues when handling large amounts of incoming data. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Affected products

• Debian Linux: 8.0
• Mozilla Firefox: before 45.5.0; before 50.0 — fixed in 45.5.0, 50.0
• Mozilla Thunderbird: before 45.5.0 — fixed in 45.5.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 45.5.0, 50.0; Mozilla Thunderbird 45.5.0. Check the vendor advisory for mitigations.

References

• http://rhn.redhat.com/errata/RHSA-2016-2780.html
• http://www.securityfocus.com/bid/94336
• http://www.securitytracker.com/id/1037298
• https://bugzilla.mozilla.org/show_bug.cgi?id=1299686
• https://security.gentoo.org/glsa/201701-15
• https://www.debian.org/security/2016/dsa-3730
• https://www.mozilla.org/security/advisories/mfsa2016-89/
• https://www.mozilla.org/security/advisories/mfsa2016-90/
• https://www.mozilla.org/security/advisories/mfsa2016-93/
• http://rhn.redhat.com/errata/RHSA-2016-2780.html
• http://www.securityfocus.com/bid/94336
• http://www.securitytracker.com/id/1037298

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