Building a Continuous Threat Exposure Management (CTEM) Program — Open Source, Cloud-Agnostic, and Zero Hidden Cost
What the CTEM program does Most security teams find out they're exposed the same way an attacker does — by scanning. The difference is who gets there first. This CTEM program flips that timeline: instead of waiting for a pentest, a bug bounty report, or an incident to reveal what's exposed, it runs the same reconnaissance an attacker would run — continuously, against your own footprint — and…
The Continuous Threat Exposure Management (CTEM) program is designed to identify and remediate security vulnerabilities before they become incidents. Instead of waiting for a pentest, bug bounty report, or incident, this program continuously scans your own footprint using the same techniques an attacker would use. This pipeline, which mirrors an actual attack chain, includes stages for discovering what exists, confirming what is alive and running, assessing vulnerabilities or misconfigurations, and correlating exposure back to identity. By doing this, the program aims to reduce risk rather than introduce new unpredictable costs.
One major concern with cloud-based CTEM programs is the hidden cost of metered pricing for AI/analysis layers. These tools may offer free tools on paper, but using AI/analysis features can lead to unpredictable charges based on usage. To avoid this, the recommended approach is to use cloud-agnostic tools that work with any major cloud provider, regardless of whether the footprint is AWS, Azure, GCP, or on-prem.
Additionally, the pipeline should be designed to be ephemeral, spinning up tools only when needed and tearing them down afterwards to avoid idle compute costs.
The CTEM program uses open-source tools such as theHarvester, Amass, Subfinder, Naabu, httpx, Nuclei, TruffleHog, ScoutSuite, and BloodHound/AzureHound/AWSHound. While open-source tools can be cost-effective, they come with the risk of being compromised. In March 2026, Aqua Security's Trivy scanner was compromised, highlighting the importance of verifying the trustworthiness of open-source tools.
This includes verifying image signatures, SLSA provenance attestations, and using short-lived OIDC tokens for cloud access rather than long-lived static credentials. By following these verification practices, you can ensure that your CTEM pipeline is secure and trustworthy.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
