The financial services sector has become a prime target for cybercriminals due to the sensitive nature of its data and the high stakes involved.
As banks embrace digital transformation, their attack surfaces expand, making robust cybersecurity measures essential. Penetration testing, or pentesting, has emerged as a cornerstone of these efforts, enabling institutions to uncover vulnerabilities before attackers exploit them.
Penetration testing simulates real-world cyberattacks to identify weaknesses in systems, networks, and applications. In 2025, this practice has evolved from a “nice-to-have” into a critical component of financial cybersecurity strategies.
According to MarketsandMarkets, the pentesting industry is expected to reach $4.5 billion by 2025, reflecting its growing adoption across sectors.
Seemant Sehgal, CEO of BreachLock, emphasised the necessity of pentesting: “If you are spending one dollar for cybersecurity and you are not doing penetration testing, then something is wrong.”
This proactive approach is especially vital as AI-driven threats become more sophisticated, requiring equally advanced defenses.
Case studies
A major bank uncovered vulnerabilities in its mobile banking app through automated penetration testing. Weak session management allowed unauthorized access to customer accounts. By addressing the flaw promptly, the bank avoided potential fraud losses exceeding $5 million.
Moreover, a specialist bank partnered with Redscan to conduct penetration tests on its hybrid infrastructure, including cloud workloads and an online banking portal.
The tests revealed overlooked vulnerabilities such as legacy protocols and weak configurations set up by third-party suppliers. These findings helped the bank strengthen its defenses and meet compliance requirements for GDPR and other regulations.
In a cautionary tale, MegaBank suffered a breach involving 15 terabytes of sensitive customer data due to undetected vulnerabilities. This incident underscores the importance of proactive pentesting to prevent such catastrophic outcomes.
Automated vs manual pentesting
Traditional pentesting methods often involve lengthy processes that leave systems exposed during downtime.
Santiago Rosenblatt, CEO of Strike, highlighted the inefficiencies of annual pentests: “You’d wait a month to launch a test, then three more to get the report. And in between, zero visibility”.
Automated penetration testing addresses these challenges by providing continuous monitoring and faster vulnerability detection.
Automated tools powered by AI and machine learning can simulate complex attack scenarios with high accuracy and speed. For example:
Strike 360 automates modules of the pentest process, reducing retesting time from two days to mere seconds while maintaining precision. AI-driven tools can identify vulnerabilities with up to 98% accuracy, ensuring comprehensive coverage.
Despite these advancements, human expertise remains indispensable for identifying context-specific vulnerabilities that automated systems might miss. Hybrid models combining AI-driven tools with ethical hackers offer the most robust approach.
Benefits and challenges
There are a range of benefits and advantages. Firstly, pentesting simulates attack patterns such as credential stuffing and session hijacking, enabling banks to address vulnerabilities before they are exploited.
Also, automated pentesting provides 24/7 monitoring, ensuring that emerging threats are neutralised in real-time, and, in addition, financial institutions must adhere to stringent regulations like DORA and GDPR. Pentesting simplifies compliance by validating security controls and generating audit-ready reports.
Moreover, pentesting tools integrate seamlessly into DevSecOps workflows, allowing banks to release software updates without compromising security.
While penetration testing has proven effective in mitigating risks, challenges remain, such as the complexity of modern banking ecosystems requires advanced tools capable of handling diverse attack scenarios.
Also, AI-driven attacks are becoming increasingly sophisticated, necessitating continuous innovation in defensive measures.
Looking ahead
By 2026, Rosenblatt predicts that 90% of companies will rely on automated pentesting for routine assessments, reserving hybrid models for critical assets.
Ethical hackers will continue to play a pivotal role in addressing nuanced vulnerabilities that require human judgment.
Penetration testing is no longer optional for banks—it is an essential defense mechanism against evolving cyber threats.
By leveraging advanced technologies like AI and adopting hybrid models that combine automation with human expertise, financial institutions can build resilient security frameworks that protect sensitive data and maintain customer trust.
As cybercriminals grow more sophisticated, banks must stay one step ahead by continuously testing their defenses. Institutions that prioritize adaptive security measures will not only mitigate risks but also thrive in an increasingly digital landscape.
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