Cyber Centre Daily Advisory Digest — 2026-06-01 (9 advisories)
The Canadian Centre for Cyber Security published a daily digest of nine security advisories covering critical updates for major vendors including Microsoft, IBM, Dell, Ubuntu, Red Hat, Ivanti, and Plesk. Notably, the digest highlights that CVE-2026-41089, a Windows Netlogon Remote Code Execution vulnerability, is actively being exploited in the wild.
- cve
- cve
- cve
- cve
Detection / HunterGoogle
What Happened
On June 1, 2026, the Canadian Centre for Cyber Security released a summary of nine security advisories for various software and hardware products. This affects users and organizations relying on systems from Microsoft, IBM, Dell, Ubuntu, Red Hat, Ivanti, and others. It is highly important because one of the Microsoft vulnerabilities (CVE-2026-41089) is currently being used by attackers in the real world. Organizations should review the provided advisories and apply the necessary security patches immediately to protect their networks.
Key Takeaways
- The Canadian Centre for Cyber Security released 9 security advisories on June 1, 2026, covering multiple major vendors.
- Microsoft's May 2026 rollup includes an update for CVE-2026-41089, a Windows Netlogon RCE vulnerability that is actively being exploited in the wild.
- Microsoft released an out-of-band update for an inadvertently omitted SharePoint RCE vulnerability (CVE-2026-45659).
- Critical updates were also released for enterprise products from IBM, Dell, Ubuntu, Red Hat, Ivanti, and Plesk, as well as various ICS devices.
Affected Systems
- Microsoft Windows
- Microsoft SharePoint
- IBM Enterprise Products
- Dell PowerEdge and Enterprise Products
- Ubuntu Linux
- Red Hat Enterprise Linux
- Ivanti Neurons for ITSM
- Plesk for Linux
- Various ICS devices (ABB, Schneider Electric, etc.)
Vulnerabilities (CVEs)
- CVE-2026-41089
- CVE-2026-45659
- CVE-2026-9614
- CVE-2026-44962
Attack Chain
The advisory digest does not detail specific attack chains. However, it notes that attackers are actively exploiting CVE-2026-41089, a Windows Netlogon Remote Code Execution vulnerability, in the wild to compromise vulnerable systems.
Detection Availability
- YARA Rules: No
- Sigma Rules: No
- Snort/Suricata Rules: No
- KQL Queries: No
- Splunk SPL Queries: No
- EQL Queries: No
- Other Detection Logic: No
Detection Engineering Assessment
EDR Visibility: None — The article is a high-level patch advisory and does not contain behavioral details or IOCs for EDR detection. Network Visibility: None — No network signatures or traffic patterns are provided in the advisory. Detection Difficulty: Hard — Without specific IOCs or behavioral patterns provided in the advisory, detecting exploitation relies on generic vulnerability scanning and vendor-provided patches.
Control Gaps
- Missing security patches
False Positive Assessment
- Low
Recommendations
Immediate Mitigation
- Verify against your organization's incident response runbook and team escalation paths before acting.
- Prioritize patching Microsoft systems against CVE-2026-41089 (Windows Netlogon RCE) due to active exploitation in the wild.
- Apply the out-of-band update for Microsoft SharePoint (CVE-2026-45659).
Infrastructure Hardening
- Review and apply updates for IBM, Dell, Ubuntu, Red Hat, Ivanti, and Plesk products as applicable to your environment.
- Evaluate ICS and OT environments for vulnerable devices listed in the CISA ICS advisories and apply mitigations.
User Protection
- Ensure mobile users update Firefox for iOS to version 151.2 or later.
Security Awareness
- Inform IT and security teams of the active exploitation of the Netlogon vulnerability to heighten monitoring around domain controllers.
