Hey guys, maybe you can help me with this one.
I've been receiving spam phone calls coming from our Cisco phone system. When I checked the logs from our phone system I see that a call came into it from the spam company and came out to my cell phone and several other numbers.
How is this possible? Is there a vulnerability somewhere I am missing?
Our design:
\- 1 publisher at Data Center \- 1 Subscriber at HQ \- Voice Gateway at Data Center and at HQ both with 2 PRIs each \- ASA at data center used specifically for VPN connected phones.
- Subscriber and publisher communicate over MPLS
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