CVE-2026-69399 — Azure Arc
CRITICALCVE-2026-69399 is a critical-severity (CVSS 10) CWE-441 vulnerability in microsoft azure arc. No vendor fix is recorded yet; mitigation options are listed below.
Azure Arc Elevation of Privilege Vulnerability
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-69399.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-69399 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
Azure Arc Elevation of Privilege Vulnerability
Affected Products
azure arcmicrosoftDetection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft azure arc deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2026-69399 yet — track the microsoft azure arc advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-69399 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.