CISA's ICS-CERT publishes hundreds of security advisories every year covering industrial control system vulnerabilities. These advisories are critical — they describe real vulnerabilities in equipment running in power plants, water treatment facilities, manufacturing lines, and building management systems.
The problem isn't access. The advisories are public. Anyone can subscribe to CISA's mailing list.
The Problem Is Signal-to-Noise
A typical ICS environment might use equipment from 5-15 vendors. But CISA covers 200+ vendors across every sector. That means 90% or more of the advisories you receive are irrelevant to your operation.
What happens in practice:
- The manual checker — Someone on the team bookmarks cisa.gov and checks it every few days. They miss things. They go on holiday and nobody covers.
- The inbox overload — Someone subscribes to CISA alerts and gets everything. After a few weeks of irrelevant notifications, the alerts get filtered to a folder that nobody reads.
- The IT handoff — The IT security team monitors advisories, but they don't know which OT equipment is actually deployed. A critical Siemens PLC vulnerability gets buried because IT doesn't know you run Siemens PLCs.
In all three cases, the result is the same: critical vulnerabilities affecting your actual equipment go unnoticed.
What Filtered Alerts Look Like
The fix is straightforward: maintain a watchlist of the specific vendors and products in your environment, and only receive alerts that match.
When a new CISA advisory is published that affects a vendor on your watchlist, you get an email with:
- The full severity breakdown and CVSS score
- Which of your watched products are affected
- Specific remediation steps from the advisory
- A direct link to the full CISA advisory
No noise. No irrelevant vendors. No manual checking.
The Cost of Missing an Advisory
ICS vulnerabilities aren't theoretical. These are weaknesses in the systems that control physical processes. A missed advisory for a critical vulnerability in your PLC firmware or HMI software could mean:
- An attacker gaining remote code execution on your control network
- Loss of visibility into your process
- Unplanned downtime while you emergency-patch
- Regulatory non-compliance if you're in a covered sector
The irony is that the information to prevent this is freely published by CISA. The gap is purely operational — getting the right advisory to the right person at the right time.
How OTWarden Works
We built OTWarden to close this gap. The alert engine monitors the CISA CSAF repository every two hours, parses each new advisory, and matches it against your watchlist. If there's a match, you get an email within the hour.
You can set up a watchlist in about two minutes. Add your vendors (Siemens, Schneider Electric, Rockwell, whatever you run), optionally add specific products, and you're done.
You can browse our full vendor database at otwarden.com/vendors — it's public, no login required.
If you'd like to try filtered alerts for your environment, there's a 14-day free trial at otwarden.com.