IT security 2026-09-21

Level Tense — 69/100 — 2026-09-21

Tense day: 1 stories ranked, 1 of the top 1 reported as actively exploited, 1 flaw newly added to CISA’s exploited-vulnerabilities catalogue. Top story: Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability (64/100).

  1. Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability — 64/100 (CVE-2026-7273)