2026 on Daily CISO
Everything we have on record from 2026.
7 weekly archive pages, 29 daily briefings, 6 guides, newest first. Each page sits under the week or day it covers. Daily CISO launched on September 27, 2026; the archive pages here were compiled after that from public records, not published in 2026.
October 2026 · 31 pages
Daily briefing ·
Quest Diagnostics Breach, PHP2Shell Patch Order Headline Oct 25 BriefingGuide ·
BeyondTrust Remote Support flaw: what CISA says to patch, hunt and rotateGuide ·
CISA on BeyondTrust Remote Support: patch, hunt and contain CVE-2026-102764Daily briefing ·
CISO Brief: Quest Diagnostics Breach, SafePay Ransomware, PHP2Shell Patch PushDaily briefing ·
CISO Briefing: PHP2Shell Patch Urgency, SafePay Ransomware, eMudhra CA RiskDaily briefing ·
PHP2Shell Patch Alert, ConnectWise Breach, and eMudhra CA Key Flaw Lead This WeekGuide ·
SafePay ransomware: what the CISA/FBI advisory says and how to defendDaily briefing ·
ConnectWise Breach, SafePay Advisory, and New KEV Flaws Lead Oct 21 BriefingDaily briefing ·
ConnectWise and Ahold Delhaize Incidents Headline This Week's CISO BriefingDaily briefing ·
CISA Flags Exploited BeyondTrust, Fortinet Bugs as Ransomware Hits HomeDaily briefing ·
BeyondTrust Zero-Day, Four New KEV Entries, and a Billion-Message Phishing TakedownDaily briefing ·
BeyondTrust Zero-Day, Ivanti VPN Breach, and New CISOs Lead Oct 17 BriefingDaily briefing ·
Ivanti VPN Zero-Days and Record Patch Tuesday Headline Oct. 16 BriefingDaily briefing ·
Ivanti Zero-Day, Critical GitLab RCE, and Retail Breaches Top Oct 15 CISO BriefingDaily briefing ·
Ivanti Zero-Day, Grocery Chain Hack, and GitLab Critical Flaw Lead Oct 14 BriefingDaily briefing ·
CISO Briefing: Grocery Freezers Hacked, Ledger Implant Steals $93M, China-Linked KEV FlawsGuide ·
EO 14028, 14144, 14306 and 14412: the federal cybersecurity deadlines still aheadDaily briefing ·
CISO Briefing: Ledger Implant Theft, Flax Typhoon Takedown, iRhythm BreachGuide ·
CVE, CVSS, KEV, EPSS and 27 more: a sourced security glossaryDaily briefing ·
Integrity Tech Advisory, iRhythm's 360K-Record Breach, and an Exploited NVIDIA GPU FlawDaily briefing ·
China-Linked Hacking Advisory, FortiBleed Lockouts, iRhythm Breach Lead This WeekDaily briefing ·
CISA Warns of China-Linked Hackers as Atlassian Flaw Exploitation BeginsDaily briefing ·
NetScaler KEV Deadline, Atlassian Exploits Begin, New CISOs at Lumen and ADMDaily briefing ·
Second NetScaler KEV in a Week, Atlassian and Dell Critical Flaws Demand PatchingGuide ·
What is CISA KEV, and how do CISOs use it?Daily briefing ·
NetScaler KEV Alert, Denmark Breach, and New CISOs Top This Week's Security NewsDaily briefing ·
NetScaler Mass Exploitation, FortiMail Zero-Day, and New Breach DisclosuresDaily briefing ·
Pentagon Breach, Citrix NetScaler and FortiMail Zero-Days Headline This BriefingDaily briefing ·
CISA Adds Zammad, FortiMail, Cisco Flaws to KEV as Pentagon Breach Hits 3MDaily briefing ·
NetScaler Zero-Days, Astrana Health Breach, and New CISA KEV EntriesDaily briefing ·
NetScaler Zero-Days, FBI Breach Claims, and Fresh Security Leadership Moves
September 2026 · 5 pages
Daily briefing ·
NetScaler and Apple Zero-Days Hit KEV as Astrana, Hasbro Disclose BreachesDaily briefing ·
Citrix NetScaler Zero-Days, FBI Breach Claim, and Astrana Health SEC Filing Lead CISO BriefingDaily briefing ·
Citrix Zero-Days, FBI Portal Breach, and a New CIO at AlteraDaily briefing ·
Check Point and F5 flaws under attack, Astrana Health files an 8-K, and Anduril needs a CISOWeekly archive page ·
Week of September 21, 2026: Zyxel switches and WordPress under attack, and the MSC names a CISOCompiled September 27, 2026 from public records
August 2026 · 1 page
Weekly archive page ·
Week of August 10, 2026: Ralph Lauren and Tricentis hire CISOs, and a Metabase zero-day exposes customer dataCompiled September 27, 2026 from public records
June 2026 · 1 page
Weekly archive page ·
Week of June 29, 2026: AdaptHealth and Navient file 8-Ks, and a SimpleHelp bypass delivers Djinn StealerCompiled September 27, 2026 from public records
May 2026 · 1 page
Weekly archive page ·
Week of May 18, 2026: TeamPCP breaches GitHub's internal repos, and the DBIR puts exploitation firstCompiled September 27, 2026 from public records
April 2026 · 1 page
Weekly archive page ·
Week of April 6, 2026: Iranian actors disrupt US PLCs, and Stryker calls its March incident materialCompiled September 27, 2026 from public records
February 2026 · 1 page
Weekly archive page ·
Week of February 23, 2026: Cisco SD-WAN zero-day dates to 2023, and CISA orders emergency fixesCompiled September 27, 2026 from public records
January 2026 · 1 page
Weekly archive page ·
Week of January 12, 2026: IonQ and Cbus name CISOs, and Microsoft disrupts the RedVDS fraud serviceCompiled September 27, 2026 from public records