The May 2026 Security Update Review
I’m currently in Berlin helping set up for Pwn2Own Berlin, but that doesn’t stop Patch Tuesday from coming, and it’s another big one. At least nothing is listed as being in the wild – for now. Take a break from your regularly scheduled activities and let’s take a look at the latest security patches from Adobe and Microsoft. Due to technical difficulties, there will not be a video companion for this month.
Summary from Zero Day Initiative.
Explained
The technology and terms in this story. Learn more
- ConceptPatch TuesdayMicrosoft's monthly security update day, the second Tuesday of every month.
- ConceptCVSS · Common Vulnerability Scoring SystemA 0–10 score for how severe a vulnerability is in theory.
- ConceptCVE · Common Vulnerabilities and ExposuresThe public ID system for vulnerabilities, such as CVE-2026-12345, so everyone means the same bug.
- ConceptExploitCode or a technique that turns a software flaw into something an attacker can actually use.