This week ·
Mercadien, P.C. CPAs
How they got in, as reported. A known flaw in software the victim ran.
← All items this week- Date
- 20 Oct 2026
- Place
- United States
- Who
- Mercadien, P.C. CPAs
- The way in
- Known software flaw
- Source
- California Attorney General
01 · What was reported
What was reported.
Mercadien, P.C. CPAs reported a data breach to the California Attorney General. Its sample notice says: “At that time, based on our investigation, we reported that the incident involved unauthorized access to Mercadien’s environment...
The way in, as the source states it: a known flaw in software the victim ran.
02 · What we check for it
What we check for it.
Software versions your site advertises and known flaws in them.
03 · Source
Source.
Source: California Attorney General ↗This page repeats what the source reported, with its date. It says nothing about any firm that is not named in it.