March 2026 CVE Landscape: 31 High-Impact Vulnerabilities Identified, Interlock Ransomware Group Exploits Cisco FMC Zero-Day

The March 2026 CVE Landscape report highlights several critical vulnerabilities, with a notable focus on the exploitation of Cisco FMC (Firewall Management Center) by the Interlock Ransomware Group. Here are key takeaways from the article:

1. High-Impact Vulnerabilities Identified: A total of 31 high-impact vulnerabilities were identified in March 2026, emphasizing the need for robust vulnerability management and prioritization.

2. Interlock Ransomware Exploiting Cisco FMC Zero-Day (CVE-2026-20131):

   • The Interlock Ransomware Group has been actively exploiting a zero-day vulnerability in Cisco's Secure Firewall Management Center (FMC) software.
   • This critical Deserialization of Untrusted Data vulnerability allows unauthenticated remote threat actors to execute arbitrary code and gain root privileges on affected devices.

3. Details of CVE-2026-20131:

   • The vulnerability resides in the web-based management interface of FMC, where insecure deserialization of user-supplied Java byte streams can be exploited.
   • An unauthenticated remote threat actor can send a crafted serialized Java object to trigger arbitrary code

Read the full article at Malware Analysis, News and Indicators - Latest topics

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