CVE-2026-41089
On 12 May 2026, Microsoft published a security advisory addressing a critical vulnerability affecting Windows Server when acting as a domain controller. This vulnerability allows an unauthenticated attacker to execute arbitrary code over a network. According to The Centre for Cybersecurity Belgium (CCB), this vulnerability is currently exploited by threat actors. It is strongly recommended updating affected Windows servers as soon as possible.
CSIRTS triage
- What
- A critical vulnerability allows unauthenticated attackers to execute arbitrary code over a network.
- Who is affected
- Windows Server acting as a domain controller is affected.
- Urgency
- Remediation is urgent as the vulnerability is currently exploited by threat actors.
- Action
- Update affected Windows servers immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation likely imminentEPSS puts this in the most-targeted tier (72.3% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 99% of all EPSS-scored CVEs.
Advisory coverage (1)
- critical2026-007: Critical Vulnerability in Windows Netlogoncert-eu · 2026-06-10
External references
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