A significant security vulnerability in Cisco's Catalyst SD-WAN Manager has been exploited by attackers months before its public disclosure. The flaw, which was revealed in early June, was reportedly being used in attacks as early as March. This situation raises serious concerns for organizations using Cisco's SD-WAN technology, as they may have been at risk for an extended period without knowledge of the threat. Companies are urged to review their systems and apply any available patches to mitigate potential risks. The exploitation of this vulnerability highlights the importance of timely disclosures and the need for vigilance in monitoring systems for suspicious activity.