voip services

4 Security Threats to VoIP Services

As work-from-home becomes the new standard in business, more and more companies need remote solutions for communication and collaboration, including VoIP services. VoIP services allow employees and executives who need to collaborate while working from home to keep their phone numbers without interrupting workflow. However, the increase in use of VoIP also means they are more of a target for hackers and other bad actors on the web. With cyberattacks on VoIP services increasing, it’s important for companies to be aware of the specific issues they could be facing.

Vishing Attacks

Vishing attacks are a form of phishing attack where instead of using an email or fake website to hoodwink users, the perpetrators target VoIP numbers and attempt to scam users on a call. Vishing attacks often involve the bad actor pretending to be a legitimate business or institution and getting away with it just long enough to learn a bit of sensitive information from their targets. Many people have dealt with robocall spammers on their smartphones by now, so the good news is that it only takes some savvy and vigilance to spot these attacks. However, all it takes is one employee to be fooled once for this to become a major security issue. Companies should brief anyone using their VoIP services about the risks.

Call Hijacking

Call hijacking is a more direct form of attack and requires more sophisticated hacking techniques. When a malicious actor hijacks a VoIP call they can listen in on calls withing the same network and attempt to learn sensitive information. The best way to defend against this is to ensure your network security is excellent and can stop outside attackers in their tracks. It certainly helps if your VoIP services provider also has expertise in network security.

DoS (Denial of Service) Attacks

DoS attacks happen when bad actors purposely flood a network with so many calls that the VoIP service cannot handle the sheer quantity and ceases to function. Hackers use these attacks to target businesses for several reasons:

  • To blackmail businesses into paying the attackers to turn off the flood of calls.
  • To make the business look bad and hurt their brand by inconveniencing customers.
  • As a distraction for another type of cyberattack.

Companies using VoIP services should make sure they are prepared to handle nefarious DoS attacks if they find themselves targeted.


VoIP services ae targeted by good old-fashioned malware attacks much like any other online service. Keeping your cybersecurity patches up to date and making sure you are aware of any potential weaknesses so they can be fixed swiftly is, as always, extremely important. Talk to your VoIP services provider if you’re unsure of their security measures. It is always good to take stock of your network security and ensure your VoIP services aren’t vulnerable to malware infection.

Stay aware of the potential online threats to your VoIP services and make sure you are always protected. If you want a consultation about VoIP services or your cybersecurity, reach out to Panurgy today.