Microsoft Azure Arc is widely deployed; a CVSS 10.0 privilege escalation enabling host takeover is highly impactful enterprise-wide.
CVE-2026-69399
Azure Arc privilege escalation enabling host admin takeover.
Is CVE-2026-69399 being exploited?
Not confirmed. CVE-2026-69399 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-69399?
CVE-2026-69399 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-69399?
Yes. A fix has been recorded for CVE-2026-69399. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-69399 affect?
CVE-2026-69399 affects Microsoft Azure Arc, Azure Arc-enabled servers, Azure Arc agents (Windows/Linux). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-69399?
Install MS update for CVE-2026-69399 immediately; isolate/restrict Arc-managed hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Privilege escalation in Azure Arc agents allowing attackers to gain administrative/system control on managed hosts.
Immediate action required