Malicious hackers exploit Cisco zero-day for highest access level at communications service provider

A previously unknown Cisco vulnerability was exploited by an attacker to gain the highest level of access at a communications service provider earlier this year. The flaw, which has since been patched by Cisco, was found in the company's SD-WAN software, a critical component for managing internet traffic within distributed organizations. This incident marks one of seven actively exploited zero-day vulnerabilities in Cisco's SD-WAN software this year. According to Mandiant, a Google-owned cybersecurity firm, the attacker was able to infiltrate the communications service provider's system, highlighting the severe consequences of delaying patching¹. The fact that the vulnerability was exploited before a patch was available underscores the importance of proactive vulnerability management. This incident matters to security practitioners because it demonstrates how quickly zero-day exploits can be leveraged, making it essential to assess exposure and apply patches promptly to prevent similar breaches.