Guard Street

How often do you test your business's cyber defenses? If the answer is once a year, there's a gap worth knowing about.

A pe*******on test only shows how secure you were on the day it ran. But your business changes all year long, and new threats show up every week. That clean report from January may not hold up by spring.

Testing more than once a year keeps your defenses honest and catches small problems before they become big ones.

Swipe through to see why regular testing matters, and reach out anytime if you'd like to talk through what a good schedule looks like for your business.

The company that gets breached usually isn’t where the attacker got in.

It’s the vendor. Payroll. The marketing tool. The small SaaS app one department signed up for last year without telling IT. We see this pattern with mid-market businesses all the time.

New post up on the five things mid-market companies get wrong about vendor risk, plus what to do about it. Worth a read if you’ve ever wondered whether your business is exposed through somebody else’s security gaps.

https://guardstreet.com/what-mid-market-businesses-get-wrong-about-vendor-risk/

Your enterprise client just asked for a Letter of Attestation. The deal is moving and you need to know what that means.

We wrote a plain-language breakdown of what it is, what it includes, and what to expect from the process.

Link: https://guardstreet.com/what-is-a-letter-of-attestation-and-why-does-your-business-need-one/

A major supply chain attack just hit the AI development world, and it has implications for any business using AI-powered tools.

LiteLLM, a widely used open-source library that connects applications to AI services like OpenAI and Google, was compromised last week. Two malicious versions were uploaded to a public software repository and downloaded by developers globally before the attack was caught. The malware was designed to steal cloud credentials, API keys, and other sensitive access data from every system it touched.

It was only discovered because a bug in the attackers’ own code crashed a researcher’s computer. Without that mistake, it could have gone unnoticed for weeks.

We put together a full breakdown of what happened, why it matters, and what organizations should be thinking about. Read the full post on our blog:

https://guardstreet.com/the-litellm-compromise-what-the-biggest-ai-supply-chain-attack-of-2026-means-for-your-business/