Claude Mythos finds 271 Firefox flaws, Mozilla believes zero-days are numbered
2026-04-22T14:51:48Z•c2b5ceb09efd9eefef70934b44aeabf71826d6c29aa82ca3cf71a4632b3f43d2
AI-securityAcronisCVEClaude-MythosElasticFirefoxGenAIIoT-securityMCPMOVEitMiraiMozillaPentAGIProgress-SoftwareProveQClawTencentWAF-bypassautonomous-penetration-testingbotnetgenerative-AIidentity-verificationinitial-accessphishingvulnerability-scanning
What happened
Aggregated security news: Anthropic’s Claude Mythos (via Opus 4.6) surfaced hundreds of Firefox issues during Mozilla testing, prompting fixes. Multiple products and vendors announced AI- and agent-focused launches (Prove Identity Platform, Acronis GenAI Protection, Elastic MCP Apps, Tencent QClaw) while Microsoft updated OneDrive with AI and access-control features. Active threats and vulnerabilities were highlighted: new Mirai variants (tuxnokill, Nexcorium) are exploiting older IoT/router/DVR flaws, and Progress fixed a WAF-bypass bug. Cisco reports phishing returned as the top initial‑user
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- helpnetsecurity
- Record identifier
- c2b5ceb09efd9eefef70934b44aeabf71826d6c29aa82ca3cf71a4632b3f43d2
- Enrichment time
- 2026-04-22T14:51:48Z
- AI-assisted enrichment
- Yes
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