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CRITICAL

CVE-2018-5186

CVSS v3

9.8

CRITICAL

EPSS Score

2.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2018-5186 Red Hat Product Security

    Mozilla: Memory safety bugs fixed in Firefox 61

Full record on NVD

Description

Memory safety bugs present in Firefox 60. 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 < 61.

Technical details

Published
2018-10-18

Frequently asked questions

What is CVE-2018-5186?

Memory safety bugs present in Firefox 60. 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 < 61.

Is CVE-2018-5186 actively exploited?

Active exploitation of CVE-2018-5186 has not been confirmed. Its EPSS score was 2.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-5186?

CVE-2018-5186 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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