CVE-2017-7780

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% 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

Memory safety bugs were reported in Firefox 54. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 55.

Affected products

Mozilla Firefox: before 55.0 — fixed in 55.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 55.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/100199
http://www.securitytracker.com/id/1039124
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1353763%2C1353356%2C1370070%2C1375435%2C1373663%2C1363150%2C1370817%2C1273678%2C1367850%2C1347968%2C1361749%2C1349138%2C1371982%2C1344666%2C1369836%2C1330739%2C1371511%2C1371484
https://www.mozilla.org/security/advisories/mfsa2017-18/
http://www.securityfocus.com/bid/100199
http://www.securitytracker.com/id/1039124
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1353763%2C1353356%2C1370070%2C1375435%2C1373663%2C1363150%2C1370817%2C1273678%2C1367850%2C1347968%2C1361749%2C1349138%2C1371982%2C1344666%2C1369836%2C1330739%2C1371511%2C1371484
https://www.mozilla.org/security/advisories/mfsa2017-18/

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