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High severity7.5NVD Advisory· Published Jan 21, 2026· Updated Apr 15, 2026

CVE-2021-47865

CVE-2021-47865

Description

ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by creating multiple simultaneous FTP connections. Attackers can repeatedly establish connections using threading to exhaust server connection limits and block legitimate user access.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Proftpd/Proftpdreferences2 versions
    (expand)+ 1 more
    • (no CPE)
    • (no CPE)range: =1.3.7a

Patches

Vulnerability mechanics

References

4

News mentions

0

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