When Zero Days Attack: Amazon Uncovers Cyber Shenanigans in Cisco and Citrix Systems
Amazon’s threat intelligence team uncovered a sneaky threat actor exploiting Cisco Identity Service Engine (ISE) and Citrix NetScaler ADC vulnerabilities to deliver custom malware. This discovery highlights the trend of threat actors focusing on critical identity and network access control infrastructure. Remember, even the best-laid security plans need a backup plan… and maybe a backup for your backup.

Hot Take:
Hold onto your firewalls, folks! It seems like even the most secure networks are getting more backdoors than a speakeasy in the 1920s. With Amazon and its MadPot honeypot network hot on the tails of these cybercriminals, it’s becoming clear that no system is safe from a good, old-fashioned zero-day exploit. It’s like the cyber version of finding out your fancy new yacht has a hole in it – right after you set sail!
Key Points:
– Amazon’s threat intelligence team discovered attacks exploiting zero-day flaws in Cisco and Citrix products.
– The vulnerabilities, CVE-2025-5777 and CVE-2025-20337, allow attackers to bypass authentication and execute arbitrary code.
– A custom malware disguised as a Cisco component was deployed using these vulnerabilities.
– The attack is linked to a highly resourced threat actor with advanced tools and knowledge.
– Emphasizes the importance of defense-in-depth strategies and robust detection capabilities.
