Vonahi’s 2025 Pentest Report reveals the top vulnerabilities attackers repeatedly exploit and shows why continuous network pentesting is crucial for businesses worldwide.
Cybercrime has become one of the most pressing threats facing businesses around the world. Global forecasts predict that by 2025, cybercrime will cost an estimated 10.5 trillion dollars each year. Despite this, penetration testing is still often approached as a once-a-year compliance requirement rather than a core part of security strategy. The problem is that without proper testing, most tools only create a feeling of safety rather than real protection.
The Vonahi Security Pentest Report 2025 shows that the same critical weaknesses continue to appear in internal penetration tests across thousands of organisations. The three most common repeat offenders are Multicast DNS spoofing, NetBIOS Name Service spoofing and Link Local Multicast Name Resolution spoofing. Collectively, these weaknesses were present in more than half of all tests performed. Attackers favour them because they are simple to execute, frequently enabled by default, and highly effective for stealing credentials and moving across a network undetected.
What makes these findings particularly dangerous is that they are not traditional CVEs with patches available. They are weaknesses in protocols and system configurations. Scanners often misclassify them as low priority or informational, despite them being some of the easiest paths for attackers to establish a foothold. Even when administrators attempt to disable them, they often reappear through new devices or configuration drift. This is why an annual penetration test is no longer enough, because by the time the report is finished, the environment has already evolved and new exposures are in place.
To solve this, Vonahi Security’s vPenTest platform helps businesses by delivering on-demand automated network penetration testing. This approach allows organisations to validate their defences continuously at a fraction of the cost of traditional manual testing. As a CREST Accredited provider in EMEA, Vonahi ensures results meet the highest global standards, providing confidence that is trusted by regulators and auditors.
Cybersecurity today is not about hoping your defences will hold — it’s about proving that they can withstand real-world attacks.
The Pentest Report 2025 highlights the threats that persist year after year and demonstrates why frequent validation is now essential
