# CVE-2026-91756: Hitachi Dynamic Link Manager for VMware OS command injection

Source: https://junglewise.ai/threats/cve-2026-91756-os-command-injection-vulnerability-in-hitachi-dynamic-link  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-91756 · Severity: high · CVSS 8.1 · Published 2026-11-10

Hitachi Dynamic Link Manager for VMware is storage management software used in virtualized environments. An OS command injection vulnerability allows an attacker to execute arbitrary commands on affected systems, potentially leading to full system compromise, data theft, or service disruption.

Technologies: [Hitachi Dynamic Link Manager for VMware](https://junglewise.ai/threats/technologies/dynamic-link-manager-for-vmware). Vendors: [Hitachi](https://junglewise.ai/threats/vendors/hitachi).

## Quick answers

**Is CVE-2026-91756 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91756 being exploited in the wild.

**How severe is CVE-2026-91756?** High severity, with a CVSS score of 8.1, published 10 November 2026.

**Which products and versions are affected?** Hitachi Dynamic Link Manager for VMware 8.7.3-00 to 9.0.4-00.

**Is there a fix for CVE-2026-91756?** Yes: fixed in 9.0.4-01. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-91756 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-91756?** Check whether you run Hitachi Dynamic Link Manager for VMware 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.

## How to fix

- Fixed in 9.0.4-01

## Technical details

The vulnerability is an OS command injection flaw in Hitachi Dynamic Link Manager for VMware versions 8.7.3-00 through 9.0.4-00. The attack requires network access and high complexity conditions (non-standard configuration or race conditions). Successful exploitation grants arbitrary command execution with the privileges of the affected service.

## Affected products

- Hitachi Dynamic Link Manager for VMware 8.7.3-00 to 9.0.4-00

## Timeline

- 2026-11-10: disclosed

## References

- [https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-161/index.html](https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-161/index.html)

## Related threats

- [Hitachi Dynamic Link Manager for VMware OS command injection](https://junglewise.ai/threats/cve-2026-91757-os-command-injection-vulnerability-in-hitachi-dynamic-link)
- [Hitachi Dynamic Link Manager for VMware integer overflow](https://junglewise.ai/threats/cve-2026-91755-integer-overflow-vulnerability-in-hitachi-dynamic-link-manager)
- [Hitachi Dynamic Link Manager for VMware stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-91754-stack-based-buffer-overflow-vulnerability-in-hitachi-dynamic-link)