Uncover the Hidden Risk: Why Every Organization Needs a Voice Security Assessment (VSA)
Introduction: The Hidden Threat in Your Voice Channel
Every day, cybersecurity leaders lose sleep over email phishing, ransomware, and endpoint vulnerabilities. But an equally dangerous threat pathway often goes unaddressed: the voice channel. Voice remains the most under-protected, over-exploited, and invisible part of the enterprise attack surface. And threat actors know it.
Whether targeting contact centers, help desks, healthcare institutions, or financial firms, bad actors use the phone to walk right through the front door. They impersonate executives. They bypass multi-factor authentication. They convince trusted staff to give up passwords and access controls, often in under 10 minutes.
It’s happening every day. And unless organizations act now, it will happen to them.
Why Voice-Based Threats Are Escalating
The threat landscape has evolved. So has the technology behind its intensification. Today’s adversaries don’t just guess passwords, they use AI, automation, and psychology to defeat humans in real-time.
Consider the following facts:
- Vishing attacks surged 442% in the second half of 2024 alone
- 1,265% increase in phone-based attacks since 2022
- 37% success in Vishing Attacks
- 70% of organizations have been victims of Vishing Attacks
Cybercriminals now use readily available Generative AI applications to clone voices, automate call flows, and write realistic interactive scripts that fool even trained employees. The result? Devastating breaches — often achieved with just a few keyword queries and a simple phone connect.
Take MGM Resorts, for example: A 10-minute vishing call led to a breach that halted operations across multiple casinos, cost over $145 million in damages, and resulted in a $45 million class-action settlement. Reference to “reasonable cybersecurity” as a failure point on the part of the defendant appeared 76 times in the legal complaint.
The unsecured voice channel is no longer a side concern. It’s a clear and present danger.
The Impact of Vishing and Social Engineering
Vishing, or voice phishing, is the most dangerous form of social engineering. For most organizations, it takes advantage of two weak points:
- People: The human element is the most targeted and most exploited vulnerability in cybersecurity.
- Phone systems: These legacy systems are rarely monitored or protected by modern security infrastructure.
When a bad actor places a vishing call, they can:
- Delays in processing permits, benefits, and consultations.
- Higher levels of constituent frustration and complaint rates.
- Loss of perceived transparency and government competence.
- Reduced access for at-risk individuals, including the elderly, non-native speakers, and those without digital access.
No VPN. No malware. No firewall to stop them — unless one has been specifically implemented for voice traffic.
The solution isn’t awareness training alone. The solution begins with visibility and that’s where the Voice Security Assessment (VSA) comes in.
What is a Voice Security Assessment (VSA)?
The Voice Security Assessment (VSA) is Mutare’s purpose-built diagnostic tool designed to uncover what’s really happening inside your voice environment.
It’s not a generic audit. It’s a data-driven, threat-focused analysis that reviews your call detail records (CDR) to detect and quantify:
- Spam storms
- Robocalls and spoofed numbers
- High-risk vishing attempts
- Reconnaissance and bot-dialing activity
In short, the VSA provides a forensic view of your voice traffic, revealing the calls that never should have reached your employees in the first place.
It’s fast. Non-invasive. Free. And once you see the results, the path forward becomes obvious.
Real-World Results: What the VSA Uncovers
Let’s talk about outcomes. Organizations across healthcare, finance, and the public sector are using the VSA to expose threats and justify immediate action.
Case Study #1: Health Insurer (7M+ Members)
INITIAL PAIN-POINTS / RISKS
- Account take-over vulnerability impacting membership
- Worsening customer satisfaction from phone interactions
- Increasing contact center agent productivity loss due to dead air spam calls
- PII and HIPAA-protected data at risk
VSA FINDINGS
- 196,000+ Annual Threat Calls
- Call Risk: Low = 55%, Medium = 35%, High = 10%
- Productivity Loss = 3.14 full-time employees/year
IMPACT OF VOICE FIREWALL IMPLEMENTATION
- The voice firewall immediately neutralized vishing and social engineering threats.
- More than 3,200 malicious calls were blocked before reaching endpoints in the first month.
- This proactive defense preserved an estimated 2.6 man-weeks of productivity in the first month.
Case Study #2: Healthcare System
INITIAL PAIN-POINTS / RISKS
- Dramatic increase in malicious calls impacting SLA and quality standards.
- Spam storms shutting down switchboard operations
- Patient/family experience and security negatively impacted by fraud calls to in-room phones.
- Unmet performance standards for CMS reimbursements risking imminent financial loss
VSA FINDINGS
- 517,152+ Annual Threat Calls
- Call Risk: Low = 72%, Medium = 18%, High = 10%
- Productivity Loss = 8.2 full-time employees/year
IMPACT OF VOICE FIREWALL IMPLEMENTATION
- The majority of disruptive robocalls and spam were blocked.
- Spam storms and vishing reconnaissance were proactively detected and neutralized before they reached the switchboard.
- Scam calls to patient rooms were virtually eliminated, enhancing patient safety and experience.
Case Study #3: Regional Banking System
INITIAL PAIN-POINTS / RISKS
- Ineffective Call Filtering: Legacy “included” solution failed to stop 687+ daily spam and nefarious calls—posing a threat to contact center security and customer trust
- Rising Threat Volume: Unwanted call traffic increased 32% over time, despite having a filtering tool in place
- Operational Impact: Bad calls continued disrupting agents, undermining efficiency, and delaying account resolution—forcing a re-evaluation during cloud migration.
VSA FINDINGS
- 961,681+ Annual Threat Calls
- Call Risk: Low = 43%, Medium = 44%, High = 13%
- Productivity Loss = 15.41 full-time employees/year
IMPACT OF VOICE FIREWALL IMPLEMENTATION
- Spam call volume dropped immediately.
- Help desk complaints requesting block numbers virtually disappeared.
- In a single month, 5,642 malicious calls were blocked before reaching endpoints.
- At an average of two minutes per interruption, 188 hours of productivity were recovered.
These are not isolated results. They’re consistent across industries.
The Voice Firewall: A True Technical Control
Unlike user training or post-incident recovery, Mutare’s Voice Firewall is a real-time technical control that filters voice traffic before it reaches a human.
It works at the network edge, analyzing every inbound call across five distinct layers:
- STIR/SHAKEN Authentication: Checks for caller ID spoofing.
- Dynamic Threat Database: Flags known spam and scam numbers.
- Voice CAPTCHA: Blocks bots with human interaction challenges.
- Threat Radar: Identifies abnormal call patterns.
- Custom Rules Engine: Tailors actions based on your policy (drop, divert, deliver).
Because it operates at the network edge, Voice Traffic Filter stops attacks before they reach your employees, the same way email gateways block phishing links.
It’s also resilient detecting deepfakes, spoofing, and AI-generated voice scams because it filters based on metadata, not just content.
Why VSA Matters to Legal, Compliance, and Risk Leaders
The legal stakes have never been higher.
Class action filings now hinge on whether breached organizations took “reasonable steps” to prevent the intrusion. Regulators and courts are focusing less on outcomes and more on intent and controls.
Ask yourself:
- Can you demonstrate a voice security strategy?
- Are you monitoring or filtering inbound voice traffic?
- Have you quantified the risk in your voice environment?
If not, you are not aligned with the “reasonable security” standard expected by regulators, shareholders, and customers alike
Shawn Tuma, a leading data breach attorney, explains:
“Reasonableness is defined by your company itself… But when you can show you’ve made legitimate efforts to mitigate known risks, even after an incident, you look far better in the eyes of regulators and judges.”
The VSA provides that defensible evidence. It shows you know the risk. That you’ve measured it. And that you’ve acted.
Your Next Step: Illuminate and Eliminate the Risk
If your organization hasn’t conducted a voice security assessment, you are operating blind. You don’t know how many malicious calls are reaching your teams. You don’t know how much productivity is being lost. And you can’t quantify your exposure in legal terms.
With the VSA, you can.
You’ll receive a detailed executive summary that shows:
- Analysis & Summary of Inbound Calls: Legitimate vs Threats
- Call Risk Breakdown: High – Medium – Low
- Evaluation of industry-aligned Key Impact Zones
- Evaluation of Key Indicators for Organizational Risk
- Alignment to Best Practices Benchmark
There’s no cost. No obligation. Just insight. From there, you can decide how best to protect your voice channel.
Final Call to Action
Schedule your free Voice Security Assessment today.
Whether you’re in IT, security, compliance, or executive leadership — it’s time to understand the risks hiding in your phone system.
Because the next breach won’t come through your firewall.
It will come through a phone call.