An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
Evidence confidence: Insufficient evidence
● Hype ● Reality
━ Hype Score (Perceived) ━ Reality threat priority. Definition changes are not new attacks.
Public exploit entries / repo candidates
Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 3 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.
Score evaluated: 2026-11-05 22:55:45.722637+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z