What’s Vulnerable › Vulnerabilities

CVE-2021-39577

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-20 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered in swftools through 20200710. A heap-buffer-overflow exists in the function main() located in swfdump.c. It allows an attacker to cause code Execution.

Affected products

• swftools: through 2020-07-10

References

• https://github.com/matthiaskramm/swftools/issues/121
• https://github.com/matthiaskramm/swftools/issues/121

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