OCTOBER 2, 2026
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Case File

CVE-2021-3378

CRITICAL · CVSS 9.8 EPSS 97.51% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-01 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 97.5% probability of exploitation in the next 30 days.

Public Exploit Signal

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

GitHub PoC Links
github.com ↗
External Security References
packetstormsecurity.com ↗ packetstormsecurity.com ↗

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

CVE
CVE-2021-3378
Severity
CRITICAL
CVSS
9.8
EPSS
97.51%

Original NVD Description

FortiLogger 4.4.2.2 is affected by Arbitrary File Upload by sending a "Content-Type: image/png" header to Config/SaveUploadedHotspotLogoFile and then visiting Assets/temp/hotspot/img/logohotspot.asp.