How do supply chain attacks compromise critical software?

Supply chain attacks are like sneaking into a toy factory to make all the toys bad so every kid gets a broken toy instead of a fun one.

Imagine you're making your favorite sandwich at home, you grab bread, peanut butter, and jelly. But what if someone sneaked into the peanut butter jar and replaced it with something yucky? Then every sandwich you make ends up tasting weird, even though you didn't do anything wrong.

Critical software is like that peanut butter. It's used by many people, maybe even your school or hospital! If a supply chain attack happens, it means someone sneaked into the place where the software is made or shared, and added something bad to it. Now, whenever someone uses that software, they might get hacked or have problems.

Think of the software as a toy factory. A hacker gets into the factory, maybe through a worker who lets them in, and changes the instructions for making the toys. Soon, every toy coming out is broken. That's how critical software can be compromised by a supply chain attack, someone sneaks in and messes up something everyone uses.