StyleWriter 1.0 contains a buffer overflow that can be triggered by supplying an excessively long string in the Pattern to Find or Advice Message fields. When a local attacker pastes a 6000‑byte payload into these fields, the application crashes, resulting in a denial of service. The flaw is a classic stack-based overflow (CWE‑120).

Editorsoftware StyleWriter 1.0 on any operating system where users can access the Add Pattern dialog is affected. No specific OS, version, or configuration limitations are provided in the advisory.

The CVSS score of 6.9 indicates a medium severity vulnerability. The EPSS score of less than 1% shows a very low probability of exploitation in the wild. It is not listed in CISA KEV, and only local users can trigger the crash. To exploit the flaw an attacker must have local access to the machine running StyleWriter and manually enter a long string in the vulnerable fields.