Daily editions

Daily CISO has published a briefing since September 27, 2026. For earlier periods, see the weekly archive, compiled from public records.

• Sunday, October 25, 2026Quest Diagnostics Breach, PHP2Shell Patch Order Headline Oct 25 Briefing
• Saturday, October 24, 2026CISO Brief: Quest Diagnostics Breach, SafePay Ransomware, PHP2Shell Patch Push
• Friday, October 23, 2026CISO Briefing: PHP2Shell Patch Urgency, SafePay Ransomware, eMudhra CA Risk
• Thursday, October 22, 2026PHP2Shell Patch Alert, ConnectWise Breach, and eMudhra CA Key Flaw Lead This Week
• Wednesday, October 21, 2026ConnectWise Breach, SafePay Advisory, and New KEV Flaws Lead Oct 21 Briefing
• Tuesday, October 20, 2026ConnectWise and Ahold Delhaize Incidents Headline This Week's CISO Briefing
• Monday, October 19, 2026CISA Flags Exploited BeyondTrust, Fortinet Bugs as Ransomware Hits Home
• Sunday, October 18, 2026BeyondTrust Zero-Day, Four New KEV Entries, and a Billion-Message Phishing Takedown
• Saturday, October 17, 2026BeyondTrust Zero-Day, Ivanti VPN Breach, and New CISOs Lead Oct 17 Briefing
• Friday, October 16, 2026Ivanti VPN Zero-Days and Record Patch Tuesday Headline Oct. 16 Briefing
• Thursday, October 15, 2026Ivanti Zero-Day, Critical GitLab RCE, and Retail Breaches Top Oct 15 CISO Briefing
• Wednesday, October 14, 2026Ivanti Zero-Day, Grocery Chain Hack, and GitLab Critical Flaw Lead Oct 14 Briefing
• Tuesday, October 13, 2026CISO Briefing: Grocery Freezers Hacked, Ledger Implant Steals $93M, China-Linked KEV Flaws
• Monday, October 12, 2026CISO Briefing: Ledger Implant Theft, Flax Typhoon Takedown, iRhythm Breach
• Sunday, October 11, 2026Integrity Tech Advisory, iRhythm's 360K-Record Breach, and an Exploited NVIDIA GPU Flaw
• Saturday, October 10, 2026China-Linked Hacking Advisory, FortiBleed Lockouts, iRhythm Breach Lead This Week
• Friday, October 9, 2026CISA Warns of China-Linked Hackers as Atlassian Flaw Exploitation Begins
• Thursday, October 8, 2026NetScaler KEV Deadline, Atlassian Exploits Begin, New CISOs at Lumen and ADM
• Wednesday, October 7, 2026Second NetScaler KEV in a Week, Atlassian and Dell Critical Flaws Demand Patching
• Tuesday, October 6, 2026NetScaler KEV Alert, Denmark Breach, and New CISOs Top This Week's Security News
• Monday, October 5, 2026NetScaler Mass Exploitation, FortiMail Zero-Day, and New Breach Disclosures
• Sunday, October 4, 2026Pentagon Breach, Citrix NetScaler and FortiMail Zero-Days Headline This Briefing
• Saturday, October 3, 2026CISA Adds Zammad, FortiMail, Cisco Flaws to KEV as Pentagon Breach Hits 3M
• Friday, October 2, 2026NetScaler Zero-Days, Astrana Health Breach, and New CISA KEV Entries
• Thursday, October 1, 2026NetScaler Zero-Days, FBI Breach Claims, and Fresh Security Leadership Moves
• Wednesday, September 30, 2026NetScaler and Apple Zero-Days Hit KEV as Astrana, Hasbro Disclose Breaches
• Tuesday, September 29, 2026Citrix NetScaler Zero-Days, FBI Breach Claim, and Astrana Health SEC Filing Lead CISO Briefing
• Monday, September 28, 2026Citrix Zero-Days, FBI Portal Breach, and a New CIO at Altera
• Sunday, September 27, 2026Check Point and F5 flaws under attack, Astrana Health files an 8-K, and Anduril needs a CISO