CVE-2021-39561
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 20200710. A stack-buffer-overflow exists in the function Gfx::opSetFillColorN() located in Gfx.cc. It allows an attacker to cause code Execution.
Technical details
- Published
- 2021-09-20
Frequently asked questions
What is CVE-2021-39561?
An issue was discovered in swftools through 20200710. A stack-buffer-overflow exists in the function Gfx::opSetFillColorN() located in Gfx.cc. It allows an attacker to cause code Execution.
Is CVE-2021-39561 actively exploited?
Active exploitation of CVE-2021-39561 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-2021-39561?
CVE-2021-39561 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-39561 affecting your environment?
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