CRITICAL

CVE-2017-7751

Q: Is CVE-2017-7751 actively exploited?

Active exploitation of CVE-2017-7751 has not been confirmed. Its EPSS score was 2.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-7751?

CVE-2017-7751 has a CVSS v3 base score of 9.8 (CRITICAL severity).

CVSS v3

9.8

CRITICAL

EPSS Score

2.8 %

exploit probability, as of 2026-10-19

CISA KEV

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-2017-7751 Red Hat Product Security241 products fixed
Mozilla: Use-after-free with content viewer listeners (MFSA 2017-16)
RHSA-2017:1561 Red Hat Product Security32 products fixed
Red Hat Security Advisory: thunderbird security update
RHSA-2017:1440 Red Hat Product Security61 products fixed
Red Hat Security Advisory: firefox security update

Full record on NVD

Description

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Technical details

Published: 2018-06-11

Frequently asked questions

What is CVE-2017-7751?

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Is CVE-2017-7751 actively exploited?

Active exploitation of CVE-2017-7751 has not been confirmed. Its EPSS score was 2.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7751?

CVE-2017-7751 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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