CVE-2017-5416

7.5 highEPSS 1.7%

High (7.5) in mozilla. EPSS 1.7% chance of exploitation in the next 30 days.

In certain circumstances a networking event listener can be prematurely released. This appears to result in a null dereference in practice. This vulnerability affects Firefox < 52 and Thunderbird < 52.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2018-06-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox
mozilla:thunderbird

References

http://www.securityfocus.com/bid/96692
http://www.securitytracker.com/id/1037966
https://bugzilla.mozilla.org/show_bug.cgi?id=1328121
https://www.mozilla.org/security/advisories/mfsa2017-05/
https://www.mozilla.org/security/advisories/mfsa2017-09/

Check your stack JSON