Daily DefSec Brief - Cyber Security News for July 24 2026
1. Russian espionage group reads Western mailboxes through zero-click Zimbra flaw — CVE-2025-66376 — CISA — https://www.cisa.gov/news-events/cybersecurity-advisories/aa26-204a 2. Clop exploits critical PTC Windchill/FlexPLM RCE for data-theft extortion — CVE-2026-12569 — BleepingComputer — https://www.bleepingcomputer.com/news/security/clop-ransomware-targets-windchill-flexplm-in-data-theft-attacks/ 3. Kimi K3 AI agents found Redis zero-days and built working RCE chains — CVE-2026-25243, CVE-2026-25589 — The Hacker News —…
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