CVE-2019-11704
CVSS v3
9.8
CRITICAL
EPSS Score
10.5 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Technical details
- Published
- 2019-07-23
- Exploit-DB
- EDB-47002
Frequently asked questions
What is CVE-2019-11704?
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Is CVE-2019-11704 actively exploited?
Active exploitation of CVE-2019-11704 has not been confirmed. Its EPSS score was 10.5% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-11704?
CVE-2019-11704 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2019-11704 affecting your environment?
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