# CVE-2026-65816: Microsoft Azure Arc name resolution privilege escalation

Source: https://junglewise.ai/threats/cve-2026-65816-microsoft-azure-arc-name-resolution-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-65816 · Severity: critical · CVSS 10 · Published 2026-08-20

Azure Arc is Microsoft's platform for managing hybrid and multi-cloud environments. A flaw in name resolution allows an attacker with network access to bypass authorization controls and gain elevated privileges across connected resources, potentially compromising the entire hybrid infrastructure managed by that Arc instance.

Technologies: [Microsoft Azure Arc](https://junglewise.ai/threats/technologies/azure-arc). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-65816 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-65816 being exploited in the wild.

**How severe is CVE-2026-65816?** Critical severity, with a CVSS score of 10, published 20 August 2026.

**Which products and versions are affected?** Microsoft Azure Arc <UNKNOWN>.

**Is there a fix for CVE-2026-65816?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-65816 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-65816?** Check whether you run Microsoft Azure Arc or Microsoft Azure Web Apps at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability involves incorrect resolution of names or references within Azure Arc's authentication or authorization logic (CWE-706 class). An attacker with network access to the Arc control plane or connected resources can exploit this flaw to bypass authorization checks and elevate their privileges without prior authentication. The defect likely affects the identity resolution or role-based access control (RBAC) enforcement mechanism. No patch availability information is available from the provided advisory references.

## Affected products

- Microsoft Azure Arc <UNKNOWN>

## Timeline

- 2026-08-20: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65816](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65816)

## Related threats

- [Microsoft Azure Arc path traversal privilege escalation](https://junglewise.ai/threats/cve-2026-70009-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Microsoft Azure Arc elevation of privilege](https://junglewise.ai/threats/cve-2026-69399-microsoft-azure-arc-elevation-of-privilege)
- [Microsoft Azure Arc cross-domain policy privilege escalation](https://junglewise.ai/threats/cve-2026-62895-microsoft-azure-arc-cross-domain-policy-privilege-escalation)
- [Microsoft Azure Arc privilege escalation via incorrect authorization](https://junglewise.ai/threats/cve-2026-69555-microsoft-azure-arc-privilege-escalation-via-incorrect)
- [Microsoft Azure MCP Server missing authentication in Azure Web Apps](https://junglewise.ai/threats/cve-2026-32211-microsoft-azure-mcp-server-missing-authentication-in-azure-web)