The SANS Internet Storm Center released its daily Stormcast for Monday, September 21st, 2026, continuing its long-running series of briefings for security practitioners. The announcement includes a link to an associated diary entry via RSS, which typically contains the technical write-up behind the audio summary.

However, the source excerpt provided here is limited to the podcast title, date, and RSS link. It does not include a summary of the threats, vulnerabilities, or observations discussed in the episode. As a result, this article cannot report on specific findings from the briefing.

Readers who want the substance of the September 21st Stormcast will need to follow the linked diary RSS feed or listen to the podcast directly. The SANS ISC remains a reliable, community-driven source for timely security information, but in this case the public excerpt stops at the announcement itself.