Every Patch Tuesday Is Followed By Exploit Wednesday

Microsoft drops patches on the second Tuesday of every month. Security teams celebrate. Attackers open a bottle.

Here’s what most executives don’t understand, and what every MSP hopes you never figure out. The moment a patch is released, the vulnerability it fixes is no longer a secret. Researchers, defenders, and attackers all get the same information at the same time. The patch itself is a roadmap. Reverse-engineer the fix and you know exactly what was broken. You know the attack vector, the affected components, and the systems still exposed. The clock starts the moment Microsoft publishes.

I spent years on the other side of this. First thing I would do after a Patch Tuesday drop was pull every outstanding CVE and start mapping potential vectors. Not because I had inside information, because Microsoft handed it to me. That window between release and remediation isn’t a minor inconvenience. It’s a structured opportunity, and sophisticated threat actors treat it exactly that way. The day after Patch Tuesday even has a name in the industry, Exploit Wednesday. That name exists for a reason.

Now here’s where your MSP comes in. Large enterprises have dedicated patch management teams, automated tooling, and contractual SLAs that mandate remediation within 24 to 48 hours for critical CVEs. Your MSP almost certainly does not. Most are running weekly or monthly patch cycles, sometimes longer if a patch requires testing or a maintenance window. That gap is not a scheduling inconvenience. It is an open door with a welcome mat.

If your MSP cannot produce documentation showing defined remediation SLAs tied to CVE severity ratings, you have a problem. If they cannot show you audit logs proving those SLAs are being met consistently, you have a bigger problem. And if your last vendor risk review didn’t ask those questions at all, you should be having a very different conversation with whoever is responsible for third-party oversight.

Patch Tuesday happens every month. Exploit Wednesday follows every single time. The only variable is whether your managed service provider closes the door before someone walks through it.

Ask the question. Demand the documentation. Your MSP’s patch cycle is either a control or a liability, and right now, most organizations have no idea which one it is. As a extra note, it has been my experience I have from Tuesday till Friday at 5pm at a minimum before 85% of companies start patching as they are scared stiff about running patches mid week, they need to get over it and /or get better.