AUGUST 4, 2026
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Case File

CVE-2021-3909

MEDIUM · CVSS 4.4 EPSS 1.51% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-11 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-3909
Severity
MEDIUM
CVSS
4.4
EPSS
1.51%

Original NVD Description

OctoRPKI does not limit the length of a connection, allowing for a slowloris DOS attack to take place which makes OctoRPKI wait forever. Specifically, the repository that OctoRPKI sends HTTP requests to will keep the connection open for a day before a response is returned, but does keep drip feeding new bytes to keep the connection alive.

Related CVEs

Other vulnerabilities affecting the same vendor(s)