CVE-2021-42199
CVSS v3
7.8
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in swftools through 20201222. A heap buffer overflow exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.
Technical details
- Published
- 2022-06-02
Frequently asked questions
What is CVE-2021-42199?
An issue was discovered in swftools through 20201222. A heap buffer overflow exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.
Is CVE-2021-42199 actively exploited?
Active exploitation of CVE-2021-42199 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42199?
CVE-2021-42199 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-42199 affecting your environment?
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