2023 on Daily CISO
Everything we have on record from 2023.
52 weekly archive pages, 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 2023.
December 2023 · 4 pages
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Week of December 25, 2023: First American's Cyber Incident Update and MFA Bypass WarningsCompiled October 16, 2026 from public records
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Week of December 18, 2023: SEC incident rule takes effect with VF's 8-K, and the FBI disrupts ALPHV/BlackCatCompiled September 27, 2026 from public records
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Week of December 11, 2023: Russian SVR TeamCity Exploitation and CISA's Secure by Design PushCompiled October 14, 2026 from public records
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Week of December 4, 2023: Star Blizzard Advisory and ColdFusion Government BreachCompiled October 14, 2026 from public records
November 2023 · 4 pages
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Week of November 27, 2023: IRGC PLC Attacks on Water Utilities and Slovenian Power RansomwareCompiled October 14, 2026 from public records
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Week of November 20, 2023: Citrix Bleed Hits Boeing, CISA-NCSC Unveil Secure AI GuidelinesCompiled October 16, 2026 from public records
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Week of November 13, 2023: Scattered Spider Advisory, Rhysida Ransomware GuidanceCompiled October 18, 2026 from public records
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Week of November 6, 2023: Ransomware disrupts ICBC's US arm, and Clop affiliate exploits a SysAid zero-dayCompiled September 27, 2026 from public records
October 2023 · 5 pages
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Week of October 30, 2023: Citrix Bleed Mass Exploitation and Biden's AI Executive OrderCompiled October 14, 2026 from public records
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Week of October 23, 2023: Cisco IOS XE KEV Additions and Okta Breach FalloutCompiled October 14, 2026 from public records
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Week of October 16, 2023: Cisco IOS XE Zero-Day, Atlassian Confluence Under AttackCompiled September 30, 2026 from public records
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Week of October 9, 2023: HTTP/2 Rapid Reset Fallout and Citrix NetScaler FlawsCompiled September 30, 2026 from public records
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Week of October 2, 2023: NSA-CISA misconfigurations advisory, Confluence zero-day added to KEVCompiled September 30, 2026 from public records
September 2023 · 4 pages
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Week of September 25, 2023: Johnson Controls hit by ransomware, and allies warn of BlackTech router implantsCompiled September 27, 2026 from public records
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Week of September 18, 2023: Snatch Ransomware Advisory and CISA KEV Catalog AdditionsCompiled September 30, 2026 from public records
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Week of September 11, 2023: KEV Adds Apple & Chrome Flaws; CISA Issues OSS RoadmapCompiled September 30, 2026 from public records
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Week of September 4, 2023: CISA Warns on ManageEngine Exploits, Microsoft Explains Stolen KeyCompiled September 30, 2026 from public records
August 2023 · 4 pages
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Week of August 28, 2023: QakBot Takedown and Infamous Chisel Malware ExposedCompiled September 30, 2026 from public records
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Week of August 21, 2023: WinRAR zero-day exploited, Seiko hit by ALPHV ransomwareCompiled September 30, 2026 from public records
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Week of August 14, 2023: Clorox discloses an IT intrusion, Colorado warns 4 million over IBM MOVEit breachCompiled September 27, 2026 from public records
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Week of August 7, 2023: Barracuda Backdoors and August Patch TuesdayCompiled September 30, 2026 from public records
July 2023 · 5 pages
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Week of July 31, 2023: Ivanti EPMM Zero-Days Exploited, CISA Publishes Strategic PlanCompiled September 30, 2026 from public records
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Week of July 24, 2023: The SEC adopts its cyber disclosure rules, and an Ivanti zero-day hits NorwayCompiled September 27, 2026 from public records
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Week of July 17, 2023: Citrix NetScaler Zero-Day, VirusTotal Data LeakCompiled September 30, 2026 from public records
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Week of July 10, 2023: Storm-0558 Outlook Breach Advisory and Revolut's $20M FraudCompiled September 30, 2026 from public records
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Week of July 3, 2023: Ransomware halts Japan's busiest port, and JumpCloud invalidates admin API keysCompiled September 27, 2026 from public records
June 2023 · 4 pages
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Week of June 26, 2023: CISA DDoS Alert, KEV Additions, and Election Security Shake-UpCompiled October 14, 2026 from public records
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Week of June 19, 2023: CISA KEV Additions and New Cybersecurity Division LeadersCompiled October 14, 2026 from public records
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Week of June 12, 2023: CISA's Management-Interface Directive and LockBit AdvisoryCompiled October 13, 2026 from public records
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Week of June 5, 2023: CL0P's MOVEit Mass-Exploitation and CISA's KEV AdditionsCompiled October 14, 2026 from public records
May 2023 · 5 pages
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Week of May 29, 2023: MOVEit Transfer zero-day exploited, and Barracuda ESG attacks traced to 2022Compiled September 27, 2026 from public records
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Week of May 22, 2023: Five Eyes expose Volt Typhoon, and Barracuda email gateways hit through a zero-dayCompiled September 27, 2026 from public records
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Week of May 15, 2023: CISA's BianLian Advisory and JD Sports' Interim CISOCompiled October 13, 2026 from public records
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Week of May 8, 2023: PaperCut Ransomware Alert and Russian Snake Malware ExposedCompiled October 13, 2026 from public records
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Week of May 1, 2023: CISA KEV additions and NFL Draft security deploymentCompiled October 12, 2026 from public records
April 2023 · 4 pages
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Week of April 24, 2023: 3CX Supply Chain Fallout Widens, CISA Issues Multiple AdvisoriesCompiled October 12, 2026 from public records
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Week of April 17, 2023: CISA Chief of Staff Transition and APT28 Cisco Router AdvisoryCompiled October 12, 2026 from public records
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Week of April 10, 2023: Allies publish secure-by-design principles, Microsoft fixes an exploited CLFS flawCompiled September 27, 2026 from public records
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Week of April 3, 2023: CISA Expands KEV Catalog as Cisco, ICS Advisories LandCompiled October 12, 2026 from public records
March 2023 · 4 pages
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Week of March 27, 2023: 3CX Supply Chain Attack and New KEV AdditionsCompiled October 12, 2026 from public records
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Week of March 20, 2023: CISA Ransomware Notifications and Cisco's Nine-Advisory Patch BatchCompiled October 12, 2026 from public records
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Week of March 13, 2023: CISA Launches Ransomware Pilot, LockBit 3.0 Advisory DropsCompiled October 11, 2026 from public records
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Week of March 6, 2023: CISA Expands KEV List, Pushes Secure-by-Design TechCompiled October 12, 2026 from public records
February 2023 · 4 pages
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Week of February 27, 2023: A new US cyber strategy shifts the burden to vendors, and DISH confirms ransomwareCompiled September 27, 2026 from public records
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Week of February 20, 2023: CISA Retires US-CERT, Adds Three Vulnerabilities to KEVCompiled October 11, 2026 from public records
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Week of February 13, 2023: Microsoft, Apple Patch Exploited Zero-Days; CISA Expands KEV ListCompiled October 12, 2026 from public records
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Week of February 6, 2023: ESXiArgs Ransomware Spree and DPRK Ransomware Funding AdvisoryCompiled October 10, 2026 from public records
January 2023 · 5 pages
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Week of January 30, 2023: Ukraine Wiper Surge and Critical OAuth, QNAP, Jira FlawsCompiled October 10, 2026 from public records
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Week of January 23, 2023: CISA RMM Phishing Warning and K-12 Security ReportCompiled October 10, 2026 from public records
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Week of January 16, 2023: T-Mobile says API abuse hit 37 million accounts, and Yum! Brands reports ransomwareCompiled September 27, 2026 from public records
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Week of January 9, 2023: Rackspace Breach Details Emerge, Microsoft Patches Zero-DayCompiled October 10, 2026 from public records
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Week of January 2, 2023: CISA ICS Advisories, Wabtec Breach, LockBit Port ThreatCompiled October 20, 2026 from public records