TL;DR

['Interlock ransomware is actively exploiting a new CVE-2026-20131 in Cisco FMC for remote root access.']

What happened

['Interlock ransomware campaign exploits newly disclosed critical vulnerability (CVE-2026-20131) affecting Cisco Secure Firewall Management Center software.', 'Exploitation leads to unauthorized access and potential system compromise due to insecure deserialization flaw.']

Why it matters for ops

['Insecure deserialization flaws allow attackers to execute arbitrary code by manipulating serialized data.', 'Attackers exploit this vulnerability for root-level control, enabling ransomware deployment on compromised systems.']

Mitigation

  • Apply Cisco Security Advisory for CVE-2026-20131 as soon as it becomes available.
  • Monitor and restrict access to the affected management interfaces.

Action items

  • Review security logs for signs of unauthorized access attempts
  • Update FMC software immediately after release

Detection IOCs

  • Unusual network traffic patterns from FMC server IP addresses
  • Sudden spikes in system resource usage during off-peak hours

Source link

https://thehackernews.com/2026/03/interlock-ransomware-exploits-cisco-fmc.html