A vulnerability scan checks your systems for known weaknesses that an attacker could use to get in. Many teams set the wrong pace here, running scans too rarely or assuming one check a month handles everything. Monthly scanning covers the basics, though it only goes so far on its own and works better within a broader plan. This guide breaks down the right frequency in simple terms, building on topics covered across the TopScan blog and what we see from teams running real workloads.
So, What Is the Short Answer?
For most businesses, a monthly scan is the starting line. This catches slow-moving problems, but attackers move faster than this. A more reliable schedule looks like this:
- Weekly scans for anything exposed to the internet.
- A monthly deep scan across your full network.
- An immediate scan after any major change.
Treat the monthly scan as your safety net. It picks up what the quicker checks miss.
Why Is Once a Month Not Enough on Its Own?
New security flaws are published every day. A scan you ran three weeks ago knows nothing about a problem reported yesterday. There is a real risk. Once a critical flaw was found in a popular web server tool, attackers broke into some companies within hours of the public disclosure. A monthly schedule alone would have left the door open for weeks. Running smaller scans more often closes this gap.
What should change my scanning schedule?
Here are factors that can push you toward checking more often:
- You release code frequently. Teams that update their product daily or weekly need a scan tied to each change.
- You handle sensitive data. Payment details and health records raise the stakes and the scrutiny.
- Your setup grows quickly. New servers, subdomains, and cloud endpoints appear without anyone sending out a memo.
- You answer to compliance rules. Standards like PCI DSS and SOC 2 expect regular, documented scanning.
How does this work for fast-moving teams?
This is where scheduling by the calendar stops working. A SaaS company pushing updates every few days cannot wait for the first of the month to find out something broke. The wiser choice is to weave scanning into the release process itself. Each new update triggers a scan that runs out of sight.
TopScan was built for this kind of setup. It connects to your build process through GitLab and GitHub, and webhook triggers let a scan start the moment a build finishes. Results land straight in Slack, so nobody has to remember to go looking. The platform also groups findings and highlights the critical ones first, which saves your team from reading raw reports line by line.
What about the assets I do not even know about?
Many breaches start with something nobody was watching. It might be an old test server, a forgotten subdomain, or a cloud endpoint that was spun up for a demo and never shut down. Scanning your known systems once a month does not do anything for these blind spots.
Continuous discovery of every asset tied to your business solves this problem. The right setup tracks your full attack surface on its own, flags new assets as they appear, and adds them to your scan list without manual effort. Your schedule then covers everything you own.
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