What’s Vulnerable › Vulnerabilities

CVE-2019-11694

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-23 · updated 2026-06-17
• Weakness: CWE-755

Description

A vulnerability exists in the Windows sandbox where an uninitialized value in memory can be leaked to a renderer from a broker when making a call to access an otherwise unavailable file. This results in the potential leaking of information stored at that memory location. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

Affected products

• Mozilla Firefox: before 60.7.0; before 67.0 — fixed in 60.7.0, 67.0
• Mozilla Thunderbird: before 60.7.0 — fixed in 60.7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 60.7.0, 67.0; Mozilla Thunderbird 60.7.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1534196
• https://www.mozilla.org/security/advisories/mfsa2019-13/
• https://www.mozilla.org/security/advisories/mfsa2019-14/
• https://www.mozilla.org/security/advisories/mfsa2019-15/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1534196
• https://www.mozilla.org/security/advisories/mfsa2019-13/
• https://www.mozilla.org/security/advisories/mfsa2019-14/
• https://www.mozilla.org/security/advisories/mfsa2019-15/

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