26 vulnerabilities found, 1 critical RCE neutralized, and zero release delays for a national land platform.
In the high-stakes world of Japanese real estate, digital transformation isn’t just about moving paper to the cloud; it’s about moving trust to the cloud. When a major real estate entity manages a national-scale land information management service, “security” isn’t just a technical requirement but the bedrock of their brand equity.
What happens when the speed of business outpaces the bandwidth of your security team? That’s exactly where our client found themselves.
The pressure: scale and deadlines
Our client was facing a classic ''growth bottleneck''. As a major player in the Japanese market, they were managing a complex, cloud-based platform built on the .NET framework. Their internal security testing team was world-class, but they were hitting a wall.
The internal team was completely overwhelmed by a high volume of testing requests flowing in from multiple subsidiaries.
At the same time, the business had committed to a tight release schedule that left zero room for a “waiting list”.
They needed to go live — and they needed to do it without the nightmare of a post-launch breach.
They didn’t need a vendor to run an automated scan and hand over a generic PDF.
They needed a high-level web application security testing service that could plug and play into their ecosystem, understand .NET nuances, and deliver results under fire.
Our mission: 121 screens and a “no-fail” mandate
When we stepped in, the project dropped a massive stack of requirements on our desk.
This wasn’t a surface-level smoke test.
Our mandate was to conduct comprehensive web application security testing across 121 distinct screens.
For the tech heads out there, you know that 121 screens isn’t just a high number.
It’s a massive attack surface.
In a land management context, these screens handle everything from sensitive geospatial data to proprietary ownership records.
Each screen represented a potential entry point for a malicious actor.
Our approach: speed meets engineering precision
To meet the "yesterday" deadline without cutting corners, we deployed a rapid-response strategy centered on three core pillars: Rapid onboarding & system mapping, Fast-tracked testing roadmap, and Dedicated execution.
- Rapid onboarding & system mapping:
We didn’t have the luxury of a month-long discovery phase.
Our senior engineering team fast-tracked onboarding to quickly understand the system architecture and project needs.
We dove straight into the .NET logic to identify where hidden vulnerabilities typically emerge in cloud-based management services. - Fast-tracked testing roadmap:
Speed can be the enemy of thoroughness without a plan.
We designed a high-velocity testing roadmap that mapped all 121 screens, ensuring our web application security testing covered every API endpoint and every user input field within the aggressive timeline. - Dedicated execution:
True partnership means sharing the client’s pressure.
To protect the go-live date, our team moved into a dedicated execution mode, including overtime work to deliver a deep-dive audit without delaying release.
We weren’t just checking boxes — we were hardening a fortress.
What we found
The results of our deep dive were a wake-up call.
We identified a total of 26 security vulnerabilities.
While many were low-to-medium risks that could be addressed through a remediation roadmap, two findings alone justified the entire engagement.
- The critical save: RCE via path traversal.
We uncovered a potential Remote Code Execution (RCE) vulnerability triggered through path traversal.
In practical terms, this flaw could have allowed an attacker to bypass directory restrictions and execute malicious code directly on the server. - The high-risk catch: Session management bypass.
We identified a flaw in how the platform handled user sessions.
This vulnerability could have enabled an unauthorized user to hijack a valid session, gaining access to sensitive land data without ever needing a password.
Technologies we used
Testing & Security
Critical Risk Mitigation
Operational Efficiency
The outcome
By the end of the engagement, the client didn’t just receive a list of bugs — they gained a secure, reliable path to market.
- Secure go-live:
The platform launched on time and, more importantly, launched safely. - Operational relief:
We offloaded pressure from the internal team, allowing them to focus on the core product roadmap instead of burning out on subsidiary-driven testing requests. - Risk mitigation:
By neutralizing the RCE and session management bypass, we helped the client avoid potential millions in data breach penalties, legal exposure, and long-term brand damage.
Our takeaway
We learned (or rather, confirmed) that even the strongest internal teams hit capacity limits. When that happens, you don't need a ''code-slinger''; you need a partner who understands the high stakes of your specific industry.
Whether it’s .NET, cloud-based architecture, or complex multi-subsidiary environments, we deliver the web application security testing service that IT leads actually trust. We don’t just find vulnerabilities, we shield your growth.
