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CVE-2017-5447

An out-of-bounds read during the processing of glyph widths during text layout. This results in a potentially exploitable crash and could…

Critical9.1EPSS 17.0%
Published
Updated
Reserved
Assigned by
mozilla

Description

An out-of-bounds read during the processing of glyph widths during text layout. This results in a potentially exploitable crash and could allow an attacker to read otherwise inaccessible memory. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

Scores

CVSS scores of CVE-2017-5447, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0Critical9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS (exploitation in 30 days)
17.0% · top 2.9% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.

Weakness

Affected products

  • Mozilla · Thunderbird

    • affected unspecified – < 52.1

  • Mozilla · Firefox ESR

    • affected unspecified – < 45.9
    • affected unspecified – < 52.1

  • Mozilla · Firefox

    • affected unspecified – < 53

References (12)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .