CVE-2016-5299
CVSS v3
7.5
HIGH
EPSS Score
1.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A previously installed malicious Android application with same signature-level permissions as Firefox can intercept AuthTokens meant for Firefox only. Note: This issue only affects Firefox for Android. Other versions and operating systems are unaffected. This vulnerability affects Firefox < 50.
Technical details
- Published
- 2018-06-11
Frequently asked questions
What is CVE-2016-5299?
A previously installed malicious Android application with same signature-level permissions as Firefox can intercept AuthTokens meant for Firefox only. Note: This issue only affects Firefox for Android. Other versions and operating systems are unaffected. This vulnerability affects Firefox < 50.
Is CVE-2016-5299 actively exploited?
Active exploitation of CVE-2016-5299 has not been confirmed. Its EPSS score was 1.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2016-5299?
CVE-2016-5299 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2016-5299 affecting your environment?
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