Vulnerability
CVE-2026-107441
Zyxel GS1900 Series Switches: out-of-bounds write leading to code execution
Most severe levelDEFCON 3 · Substantial risk
Official data
- CVSS 3.1
- 8.8 · high
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- EPSS
- 0.29% estimated probability of exploitation in the next 30 days, higher than 22% of CVEs
- CISA KEV catalogue
- No
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 15 November 2026.
Timeline
- 3 November 2026Published on NVD
- 4 November 2026First in the DefenceLevel briefing
In DefenceLevel briefings5 days
- 8 November 2026Still ongoingDEFCON 4
- 7 November 2026Still ongoingDEFCON 4
- 6 November 2026New in the last 24 hoursDEFCON 3
- 5 November 2026New in the last 24 hoursDEFCON 3
- 4 November 2026New in the last 24 hoursDEFCON 3
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.