Hackers Target Iran Network Infrastructure Exploiting Cisco Software Flaw

Exploiting a Cisco software vulnerability, publicized and patched by the Silicon Valley-based firm on March 28, Internet service providers and data centers have come under attack around the globe. Some 3,500 devices were targeted in Iran.
The attack on Iran’s network infrastructure was launched on 20:15 local time on April 6 and was foiled by Iran Computer Emergency Response Team Coordination Center (Iran CERTCC) in two hours.
According to an ICT Ministry statement, hackers targeted ISPs and databases resulting in disrupted communications leaving subscribers disconnected in some areas.
A vulnerability in routers from Cisco was exploited which had earlier issued a warning and provided a patch that some firms had failed to install over Norouz, the Iranian New Year holiday (March 21 to April 2).
Hackers left the image of a US flag on screens along with a warning, "Don't mess with our elections."