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-2026-67277

HIGH CVSS 8.8 CVSS 4.0 📌 Analyzed

CVE-2026-67277 - MikroTik RouterOS Missing Authentication for Critical Function Vulnerability - [Actively Exploited]

RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet buffer. A separate unchecked, inverted packet-size interval causes unsigned integer underflow, anomalously large fragmented output, and can restart the RouterOS kernel.

This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

Published: Sep 05, 2026 20:17

Last Modified: Sep 11, 2026 12:52