Silent Lynx Exploits WinRAR Flaw to Deploy Reverse Shell in CIS Government Attacks · 3h NGINX Fixes 5 Flaws, Including Possible RCE and a TLS Bug That May Skip Client-Cert Checks · 6h Next.js Ships Out-of-Band Patch for Two Critical RCE Flaws in Caching and SVG Processing · 6h Drupal Patches Critical Core RCE Flaw with No-Login Path via Contributed Modules · 7h Vulnerability in Sparx Systems Enterprise Architect software · 7h Curl verhelpt 'high' RCE-kwetsbaarheid gevonden door Anthropic · 7h Vulnerabilities in Slican telephone exchanges · 8h Palo Alto Networks waarschuwt voor misbruik van beveiligingslek in firewalls · 11h Cisco meldt actief misbruik van kritiek lek in Secure Email Gateway · 11h Langflow's Critical Authenticated RCE Flaw Targeted in 1,423 Honeypot Exploit Attempts · 12h Silent Lynx Exploits WinRAR Flaw to Deploy Reverse Shell in CIS Government Attacks · 3h NGINX Fixes 5 Flaws, Including Possible RCE and a TLS Bug That May Skip Client-Cert Checks · 6h Next.js Ships Out-of-Band Patch for Two Critical RCE Flaws in Caching and SVG Processing · 6h Drupal Patches Critical Core RCE Flaw with No-Login Path via Contributed Modules · 7h Vulnerability in Sparx Systems Enterprise Architect software · 7h Curl verhelpt 'high' RCE-kwetsbaarheid gevonden door Anthropic · 7h Vulnerabilities in Slican telephone exchanges · 8h Palo Alto Networks waarschuwt voor misbruik van beveiligingslek in firewalls · 11h Cisco meldt actief misbruik van kritiek lek in Secure Email Gateway · 11h Langflow's Critical Authenticated RCE Flaw Targeted in 1,423 Honeypot Exploit Attempts · 12h

ACyber Sentinel Security Assessment Team

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⚠️ Vulnerability Report

CVE-2021-3199

CRITICAL CVSS 9.8 CVSS 3.1 📌 Analyzed

CVE-2021-3199 - ONLYOFFICE Docs Server Path Traversal Vulnerability - [Actively Exploited]

Directory traversal with remote code execution can occur in /upload in ONLYOFFICE Document Server before 5.6.3, when JWT is used, via a /.. sequence in an image upload parameter.

Published: Jan 26, 2021 18:16

Last Modified: Oct 09, 2026 14:20