Estimated reading time: 10 minutes
Guest Author: Jonathan Selby, Technology Vertical Lead, Founder Shield.
Most of us fear the “bad link” in a fake email, and we diligently train our teams to spot fishy notes. But what if the threat comes from a tool you already trust? The recent hit on Notepad++ shows a new trend—hackers got into the system used for software updates. This means the risk arrived through a front door left wide open.
In the past, updates were the cure for bugs, and now, they can be the cause of a breach. For a business, this creates a significant trust gap. If your core tools are unsafe, your whole firm is at risk. This is not simply a tech error; it’s a massive risk to your bottom line and your brand. How can companies manage the risks posed by such a prominent systemic error?
Why the Supply Chain Is the New Target
Hackers now focus on the supply chain because it offers an incredible return on effort. In a standard attack, a threat actor must target one firm at a time. This is time-consuming and has a high chance of failure. However, by breaching a single software vendor at the source, they gain a silent backdoor into every company that uses that tool.
This “one-to-many” math is why these attacks are on the rise. It allows a single exploit to scale across the globe in just minutes. When a vendor’s update system is seized, the hackers aren’t just hitting one target; they are hitting thousands of downstream victims simultaneously.
Weaponizing Trust
Update systems are the “Holy Grail” for modern attackers. Most security teams spend their time blocking unknown files and untrusted sites. However, software updates from a known vendor are almost always “white-listed” by firewalls. They are seen as safe by default.
Attackers weaponize this trust to bypass the most hardened parts of a network’s defenses. Because these updates are signed with valid keys, the system does not question them. Users have no reason to doubt a routine pop-up asking to install a patch. This makes the update system a perfect delivery vehicle for malware that can sit hidden for months.
The Open-Source Vulnerability
Many of the tools we use every day rely on open-source code. While this code is often robust, it frequently lacks the detailed oversight of paid products. Small utilities like Notepad++ are “load-bearing” parts of modern work. Yet they are often maintained by small teams or even by a single individual.
When these tools are integrated into a corporate tech stack without a check, they create a blind spot. A vulnerability in one small, open-source library can permeate a company’s entire infrastructure. Without a clear view of where this code comes from, firms remain blind to the risks they are actually carrying.
The Insurance Perspective: Shifting Risk Profiles
The technical side of a supply chain attack is complex, but the financial fallout is even more daunting. In the insurance world, these events represent a radical shift in how we quantify danger.
Accumulation Risk
Underwriters are increasingly focused on what we call accumulation risk. In a standard cyber event, a single company faces a breach, and the insurer pays out a single claim. However, when a common tool like Notepad++ or a major cloud provider is hit, it creates a “correlation event.”
Imagine an insurer with 1,000 clients, and half of them use the same compromised tool. If that tool fails, the insurer faces 500 claims at once. This systemic vulnerability is a nightmare for the industry. It’s why we are seeing a hardening of the market, where insurers are becoming far more selective about the tech stacks they are willing to back.
The Definition of “Reasonable Security”
For years, reasonable security was a simple checklist. Did you have a firewall? Did you use MFA? Most importantly, did you keep your software current? The Notepad++ incident turns that last question on its head. If the update itself is the poison, then simply clicking “install” might actually be a failure of due diligence.
We are moving toward a standard in which “reasonable” now includes vetting the update process itself. Insurers may soon ask not just if you update, but how you verify those updates before they reach your production environment. If a firm cannot show it has a process for vetting third-party code, it may find its “duty of care” called into question during a claim.
Business Interruption
The cost of a supply chain breach often dwarfs the cost of a data leak. When a trusted tool is compromised, the first reaction is often to shut everything down. This led to massive Business Interruption (BI) costs.
A firm might lose days or even weeks of production while they scrub their systems and verify every line of code. These “indirect” losses—lost revenue, missed deadlines, and damaged reputation—are often the most expensive parts of a claim. In today’s hyper-connected economy, a few hours of downtime can flow through a company’s entire balance sheet.
Reimagining Third-Party Risk Management (TPRM)
The old way of managing vendors—sending out a 50-page PDF questionnaire once a year—has officially expired. It’s a “paper” activity that provides no real protection against a live, shifting threat.
Beyond “Set It and Forget It”
Effective risk management calls for a shift away from static trust. We must move toward a model of continual monitoring. This means you can no longer assume a vendor is safe just because they were safe six months ago. You need to keep informed about their security posture and any incidents they report.
If a vendor is slow to disclose a breach or lacks a clear plan for securing their own software pipeline, they represent a liability. Risk managers must have the authority to pull the plug on tools that do not meet a high bar of transparency.
The Tech Stack Inventory
You cannot manage what you do not see. Most firms are shocked to learn how much “shadow IT” exists in their halls. A developer might download a small utility like Notepad++ for a quick task, and suddenly that tool is part of your corporate infrastructure.
A core part of modern risk management is maintaining a live inventory of all software. This includes open-source tools, browser extensions, and small utilities. Every one of these is a potential entry point. Knowing exactly what is running on your network lets you react faster when a specific tool is flagged as compromised.
The Least Privilege Principle for Software
We often talk about “least privilege” for employees—only giving people the data they need to do their jobs. We must now apply this to our software. Does a text editor really need access to your entire server? Does a PDF viewer need to talk to the internet?
By “ringfencing” your tools, you limit the damage a compromised update can do. If a tool is breached, its access should be so limited that the hackers have nowhere to go. Treating your software with the same skepticism as a new employee is the initial step toward a resilient network.
Practical Steps for Risk Mitigation
The complexity of supply chain risk can feel overwhelming, but it is manageable with a clear process. The goal is to move from passive trust to active verification.
Get The Cyber Insurance News Upload Delivered
Subscribe to our newsletter!
Vetting the Vendor’s Security
The days of “check-the-box” security forms are over. Instead of asking if a vendor has a policy, look at their Software Development Lifecycle (SDLC). You want to know how they build their code and who has access to the “keys” to their update system.
Ask your key partners for a Software Bill of Materials (SBOM). This is essentially a list of ingredients for their software. It allows your team to determine whether a vendor is using old or “buggy” code from another source. If a vendor cannot or will not provide this, they may be a weak link in your chain.
Staged Rollouts and Sandboxing
The most effective way to stop a poisoned update is to stop using “Auto-Update” for business-critical tools. For any software that handles sensitive data, you should use a staged rollout.
This means you install the update on a single, isolated machine—a “sandbox”—first. You monitor that machine for any odd behavior for a few days before pushing the update to the rest of the firm. This small delay creates a vital buffer. It gives the security community time to flag a bad update before it hits your entire network.
Monitoring and Detection
Since you cannot always stop a breach at the door, you must be able to spot it once it is inside. Modern Endpoint Detection and Response (EDR) tools are built for this. They don’t just look for “bad files”; they look for “bad behavior.”
If a simple text editor like Notepad++ suddenly starts trying to reach an unknown server in another country, an EDR tool will kill that process immediately. This “living-off-the-land” detection is your last line of defense. It assumes the guest you invited in might be a threat and watches their every move.
The Road Ahead
The Notepad++ incident is not a one-off event. It is the new normal. We are seeing a sophisticated evolution where hackers use our own tools against us. While the lines between your firm and your vendors blur, your defense needs to adapt.
A forward-looking approach to risk management is the only way to stay resilient and insurable in this new landscape. You cannot stop every attack, but you can build a process that catches them before they become a crisis. In the end, if you cannot trust your tools, you must trust your process.
FAQ: Supply Chain Cyber Risk And Software Update Attacks
The following FAQ was researched and written by the Cyber Insurance News editorial team to accompany this guest submission.
What is a software supply chain attack?
A software supply chain attack targets the update or distribution system of a trusted vendor rather than attacking end users directly. When attackers compromise a vendor’s update pipeline, every organization that installs that update becomes a victim. The Notepad++ incident is a recent example of this attack pattern.
Why does supply chain cyber risk matter for cyber insurance?
Supply chain attacks create accumulation risk for insurers. When a single compromised tool reaches thousands of policyholders simultaneously, an insurer can face hundreds of claims at once from a single event. This correlation risk is one of the primary reasons carriers are hardening underwriting standards around vendor exposure and third-party risk management.
What is accumulation risk in cyber insurance?
Accumulation risk refers to the concentration of loss exposure across multiple policyholders from a single shared vulnerability. If a widely used tool is compromised, every policyholder running that tool becomes exposed at the same moment. Underwriters use accumulation modeling to assess how much correlated exposure sits within their book of business.
How are insurers responding to software supply chain risk?
Carriers are increasingly asking about third-party risk management practices during underwriting. Questions now extend beyond whether a company keeps software current to how it verifies updates before deployment. Organizations that cannot demonstrate a vendor vetting process or maintain a software inventory may face higher premiums or coverage restrictions.
What steps reduce supply chain cyber risk exposure?
Key controls include maintaining a live software inventory, applying staged update rollouts rather than automatic updates for business-critical tools, requesting Software Bills of Materials from key vendors, implementing endpoint detection and response tools, and applying least-privilege access principles to software as well as users.
Author
Jonathan Selby is the Technology Vertical Lead and Managing Director at Founder Shield. A veteran of the team since 2016, he leverages a decade of brokerage experience to deliver high-level risk strategy for global high-growth companies. When he’s not scaling client portfolios, Jonathan is likely mastering the basketball court or the chessboard.
The views and opinions expressed in this guest article are those of the author and do not necessarily reflect the official policy or position of Cyber Insurance News & Information
Related Cyber Insurance Posts
- What Your Cyber Insurance Policy Misses – And What Attackers Find First – NEW PODCAST
- The CrowdStrike Outage: A Wake-Up Call for Cybersecurity and Insurance
- Protect Your Brand, Not Just Your Data: The Critical Role of ERM in Cyber Risk
- Marks & Spencer Gets $132 million in Cyber Insurance Claims, But Cyber Attack Slashes Profits
- If You Think Your Secrets Are Safe, Think Again: Even the FBI Can’t Hide