# CVE-2026-77909: Microsoft Azure CycleCloud credential exposure over network

Source: https://junglewise.ai/threats/cve-2026-77909-microsoft-azure-cyclecloud-credential-exposure-over-network  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-77909 · Severity: high · CVSS 7.7 · Published 2026-09-08

Azure CycleCloud is a cluster management tool used by enterprises to deploy and manage high-performance computing workloads in the cloud. Insufficiently protected credentials in the product can allow an authenticated user to intercept and disclose sensitive authentication material over the network, potentially leading to unauthorized access to computing resources and data.

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

## Quick answers

**Is CVE-2026-77909 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77909 being exploited in the wild.

**How severe is CVE-2026-77909?** High severity, with a CVSS score of 7.7, published 8 September 2026.

**Which products and versions are affected?** Microsoft Azure CycleCloud.

**Is there a fix for CVE-2026-77909?** 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-2026-77909 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-77909?** Check whether you run Microsoft Azure CycleCloud. 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 stems from insufficiently protected credential storage or transmission in Azure CycleCloud. An authorized attacker with network access can intercept and disclose credentials over the network. The attack requires prior authentication or authorized access to the system, and results in information disclosure that could facilitate further compromise of the cluster or related cloud resources. Microsoft has released security updates to address this issue.

## Affected products

- Microsoft Azure CycleCloud

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77909](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77909)

## Related threats

- [Microsoft Azure CycleCloud path traversal privilege escalation](https://junglewise.ai/threats/cve-2026-114161-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Microsoft Azure CycleCloud path traversal](https://junglewise.ai/threats/cve-2026-113823-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Azure CycleCloud privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-113822-missing-authorization-in-azure-cyclecloud-allows-an-authorized)
- [Microsoft Azure CycleCloud OS command injection](https://junglewise.ai/threats/cve-2026-102224-improper-neutralization-of-special-elements-used-in-an-os)
- [Azure CycleCloud OS command injection](https://junglewise.ai/threats/cve-2026-100207-improper-neutralization-of-special-elements-used-in-an-os)