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Case File

CVE-2021-28918

CRITICAL · CVSS 9.1 EPSS 16.66% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-01 · 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
github.com ↗ github.com ↗ github.com ↗

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

CVE
CVE-2021-28918
Severity
CRITICAL
CVSS
9.1
EPSS
16.66%

Original NVD Description

Improper input validation of octal strings in netmask npm package v1.0.6 and below allows unauthenticated remote attackers to perform indeterminate SSRF, RFI, and LFI attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts.