Cloudflare Zero-Day Flaw Exploited to Bypass Security Protections

Cloudflare Zero-Day Flaw Exploited to Bypass Security Protections

First seen 21 Jan 2026, 06:39 UTC •LinkedinCyberpress •82% similarity •71.3

Article Content

Browse articles
ThreatCluster

On October 9, 2025, security researchers from FearsOff discovered a zero-day flaw in Cloudflare that allowed attackers to bypass security protections by exploiting a specific certificate-validation request. The vulnerability involved the abuse of an ACME validation route, highlighting potential risks in design choices.

ThreatCluster AI How this analysis works

Extracted Entities

1 / 2

Community

Browse all →

Tracked Entities in This Story

Cloudflare