Cyber Security News for October 6 2026 - Daily DefSec Brief

Daily DefSec Brief · Oct 6, 2026 · 4m · transcript

1. ClickFix stages its payload in the browser cache — Do: Disable Windows Script Host where it isn't needed — https://thehackernews.com/2026/10/clickfix-smuggles-payloads-through.html

2. Atlassian Data Center leaks files without a login — CVE-2026-21589 — Fixed: see Atlassian's table (Confluence 9.2.26 / 10.2.19, Jira 9.12.40 / 10.3.26 / 11.3.12, Bitbucket 9.4.26 / 10.2.8 / 10.5.1, Crowd 6.3.7 / 7.0.3 / 7.1.7 / 7.2.4, Bamboo 10.2.24 / 12.1.12, Crucible and Fisheye 4.9.15) — Do: Patch Atlassian Data Center or take it offline —…