From gbhackers.com
![cisco bug](https://i2.wp.com/1.bp.blogspot.com/-kQysLJ1d3Iw/X08oL8s7EnI/AAAAAAAAKUI/8Qsg-RXBH44HGFTjIqcIJdmgLwa-CxAQgCLcBGAsYHQ/s16000/cisco%2Bbug.png?w=696&ssl=1)
Cisco warned users that the hackers actively exploited a bug in carrier-grade-routers, and it was a zero-day vulnerability affecting the Internetwork Operating System (IOS) that boats with its networking devices.
The security experts termed the vulnerability as CVE-2020-3566, and it affects the Distance Vector Multicast Routing Protocol (DVMRP) feature of its operating system.