What’s Vulnerable › Vulnerabilities

CVE-2020-20276

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-18 · updated 2026-06-17
• Weakness: CWE-787

Description

An unauthenticated stack-based buffer overflow vulnerability in common.c's handle_PORT in uftpd FTP server versions 2.10 and earlier can be abused to cause a crash and could potentially lead to remote code execution.

Affected products

• troglobit uftpd: through 2.10

References

• https://arinerron.com/blog/posts/6
• https://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9dd
• https://arinerron.com/blog/posts/6
• https://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9dd

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