Digest · Monday
Security digest: September 21, 2026
1 known exploited (cisa kev) addition.
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Take stock
- Do you run any of these? Zyxel GS1900 Series Switches. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-09-24.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.
Known exploited (CISA KEV) 1
Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.
| CVE | Product and flaw | CISA due |
|---|---|---|
| CVE-2026-7273 | Zyxel GS1900 Series Switches Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability | 2026-09-24 |
Critical advisories by ecosystem 0
GitHub-reviewed advisories rated critical, published this day (Pacific time).
None.