What’s Vulnerable › Vulnerabilities

CVE-2021-42203

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-06-02 · updated 2026-06-17
• Weakness: CWE-416

Description

An issue was discovered in swftools through 20201222. A heap-use-after-free exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.

Affected products

• swftools: through 2020-12-22

References

• https://github.com/matthiaskramm/swftools/issues/176
• https://github.com/matthiaskramm/swftools/issues/176

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