CISO Brief: February 11, 2026 – Critical Vulnerabilities, Nation-State Threats, and Ransomware Developments

Staying ahead of emerging threats is essential for enterprise resilience. This week brings a mix of critical vulnerabilities, advanced ransomware, and sophisticated nation-state activity. CISOs should prioritize patching, review detection capabilities, and prepare executive responses to evolving risks. Below are the top items requiring immediate attention, notable developments, and a concise action checklist.

Top Items CISOs Should Care About (Priority)

Microsoft Patches 59 Vulnerabilities Including Six Actively Exploited Zero-Days

• What happened: Microsoft released patches for 59 vulnerabilities, including six zero-days currently being exploited in the wild.
• Why it matters: Unpatched systems are at high risk of compromise and regulatory scrutiny.
• What to verify internally:
  • All Microsoft systems are patched promptly, especially endpoints and servers.
  • Vulnerability management processes are up to date and effective.
  • Critical assets are prioritized for patching and monitoring.
  • Incident response plans are ready for potential exploitation scenarios.
• Exec questions to prepare for:
  • Are we exposed to any of the zero-days?
  • How quickly can we patch across the enterprise?
  • What is our current risk posture for Microsoft environments?
  • Have we detected any signs of exploitation?
• Sample CISO response: "We are expediting patch deployment for all Microsoft systems and have increased monitoring for indicators of compromise related to these zero-days."

Reynolds Ransomware Embeds BYOVD Driver to Disable EDR Security Tools

• What happened: The Reynolds ransomware group is using a Bring Your Own Vulnerable Driver (BYOVD) technique to disable endpoint detection and response (EDR) tools before deploying ransomware.
• Why it matters: Disabling EDR increases the likelihood and impact of successful ransomware attacks.
• What to verify internally:
  • EDR and antivirus solutions are updated and monitored for tampering.
  • Driver allow/block lists are enforced on endpoints.
  • Incident response playbooks include EDR bypass scenarios.
  • Backups are tested and isolated from endpoints.
• Exec questions to prepare for:
  • Can our EDR be bypassed by similar techniques?
  • What is our ransomware response readiness?
  • How do we detect and respond to EDR tampering?
• Sample CISO response: "We are reviewing EDR configurations and have implemented additional controls to detect and prevent driver-based bypass attempts."

Fortinet Patches Critical SQLi Flaw Enabling Unauthenticated Code Execution

• What happened: Fortinet released patches for a critical SQL injection vulnerability that allows unauthenticated attackers to execute code remotely.
• Why it matters: Exploitation could lead to full compromise of network security infrastructure.
• What to verify internally:
  • All affected Fortinet devices are identified and patched.
  • External exposure of Fortinet devices is minimized.
  • Logs are reviewed for signs of exploitation attempts.
  • Access controls and segmentation are enforced around critical devices.
• Exec questions to prepare for:
  • Are any of our Fortinet devices vulnerable?
  • What is our patching timeline for network appliances?
  • Have we seen any suspicious activity targeting Fortinet systems?
• Sample CISO response: "We have prioritized patching of all Fortinet devices and are monitoring for any exploitation attempts."

SSHStalker Botnet Uses IRC C2 to Control Linux Systems via Legacy Kernel Exploits

• What happened: The SSHStalker botnet is actively exploiting legacy Linux kernel vulnerabilities and using IRC channels for command and control.
• Why it matters: Compromised Linux systems could be leveraged for broader attacks or data exfiltration.
• What to verify internally:
  • Linux systems are running supported and patched kernels.
  • Network monitoring for unusual IRC traffic is in place.
  • Legacy systems are inventoried and risk-assessed.
  • Segmentation limits exposure of critical Linux assets.
• Exec questions to prepare for:
  • Do we have legacy Linux systems at risk?
  • How do we detect botnet activity in our environment?
  • What is our plan for legacy system remediation?
• Sample CISO response: "We are accelerating patching of Linux systems and enhancing monitoring for suspicious IRC-based communications."

North Korea-Linked UNC1069 Uses AI Lures to Attack Cryptocurrency Organizations

• What happened: Nation-state actors linked to North Korea are using AI-generated lures to target cryptocurrency organizations with advanced phishing and malware.
• Why it matters: These attacks are sophisticated and could result in significant financial and reputational loss.
• What to verify internally:
  • Employee awareness training includes AI-based phishing tactics.
  • Email and web filtering controls are updated for new lures.
  • Incident response plans cover targeted phishing and malware scenarios.
  • Monitoring for unusual access to crypto-related assets is active.
• Exec questions to prepare for:
  • Are we a potential target for these campaigns?
  • How do we detect AI-generated phishing attempts?
  • What controls are in place to protect crypto assets?
• Sample CISO response: "We have updated user training and technical controls to address AI-driven phishing and are closely monitoring crypto-related activities."

DPRK Operatives Impersonate Professionals on LinkedIn to Infiltrate Companies

• What happened: North Korean operatives are impersonating professionals on LinkedIn to gain access to organizations through social engineering.
• Why it matters: Social engineering campaigns can bypass technical controls and lead to significant infiltration and brand risk.
• What to verify internally:
  • Employee training on social engineering and LinkedIn risks is current.
  • HR and recruiting teams are aware of impersonation tactics.
  • Incident reporting channels for suspicious contacts are well-publicized.
  • Brand monitoring for impersonation is active.
• Exec questions to prepare for:
  • Have any employees been targeted or compromised?
  • What is our process for reporting and responding to impersonation?
  • How do we protect our brand from social engineering?
• Sample CISO response: "We are reinforcing employee awareness and have established clear protocols for reporting and investigating impersonation attempts."

ZeroDayRAT Malware Grants Full Access to Android, iOS Devices

• What happened: ZeroDayRAT malware has been discovered granting attackers full access to both Android and iOS devices.
• Why it matters: Mobile device compromise can lead to broad data exposure and operational risk.
• What to verify internally:
  • Mobile device management (MDM) policies are enforced and up to date.
  • Employee guidance on mobile app security is current.
  • Monitoring for unusual mobile device activity is in place.
  • Incident response includes mobile compromise scenarios.
• Exec questions to prepare for:
  • Are corporate or BYOD devices at risk?
  • What controls are in place for mobile security?
  • How do we detect and respond to mobile device compromise?
• Sample CISO response: "We are reviewing mobile security controls and have communicated updated guidance to all users regarding mobile threats."

Volvo Group North America Customer Data Exposed in Conduent Hack

• What happened: Customer data was exposed following a supply chain breach involving Conduent, impacting Volvo Group North America.
• Why it matters: Supply chain breaches can lead to regulatory, legal, and reputational consequences.
• What to verify internally:
  • Third-party risk management processes are current and effective.
  • Data sharing with vendors is minimized and monitored.
  • Incident response plans address supply chain breaches.
  • Regulatory notification requirements are understood and prepared.
• Exec questions to prepare for:
  • Are any of our vendors affected?
  • What customer data could be at risk?
  • How do we respond to supply chain incidents?
• Sample CISO response: "We are reviewing our vendor relationships and have confirmed our incident response plans address supply chain data exposures."

Notable Items

• Crypto-mining in Fortune 500 cloud environments highlights resource abuse risks.
• Ransomware evolving into persistent digital threats.
• Malicious 7-Zip site distributing proxy-laced installers.
• Windows 10 extended security update addresses legacy vulnerabilities.
• New Secure Boot certificates released for device security.
• Microsoft 365 admin center outage impacts cloud management.

CISO Action Checklist Today

• Ensure all Microsoft and Fortinet patches are deployed enterprise-wide.
• Review EDR and antivirus configurations for BYOVD and tampering protections.
• Inventory and patch legacy Linux systems; monitor for IRC-based C2 traffic.
• Update employee training on AI-driven phishing and LinkedIn impersonation.
• Reinforce mobile device management and security guidance for all users.
• Assess third-party and supply chain risk management processes.
• Test and validate incident response plans for ransomware, supply chain, and mobile threats.
• Monitor for signs of exploitation or compromise across all critical assets.
• Communicate key risks and mitigation steps to executive leadership.
• Document regulatory notification requirements for potential data exposures.