Wiktionary
n. (context computer security English) A security vulnerability in a software system.
Usage examples of "security hole".
If ISC opened customer systems to shipborne ansibles, that would mean a massive security hole.
The President, it was rumored, was not safely tucked into a maximum-security hole, nor was the Vice President.
But a couple of reasonable assumptions made a security hole big enough to shove a twenty-meter container box through that wasn't defined as a failure.
And their damned smith was all the time following me around, trying to find out if I had a security hole that he could crack.
There was a little gate at the far end of the wall around Companion's Field that would have been a dreadful security hole had it not been closed by three doorsthe final one of iron cunningly cast to look exactly like the rusty-brown stone that the wall itself was made of.