CVSS v3
9.1
CRITICAL
EPSS Score
17.1%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
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.
Active exploitation of CVE-2017-5447 has not been confirmed. The EPSS score is 17.1%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2017-5447 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
Ranked by exploit probability (EPSS).