# CVE-2026-91755: Hitachi Dynamic Link Manager for VMware integer overflow

Source: https://junglewise.ai/threats/cve-2026-91755-integer-overflow-vulnerability-in-hitachi-dynamic-link-manager  
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-2026-91755 · Severity: high · CVSS 8.1 · Published 2026-11-10

Hitachi Dynamic Link Manager for VMware is storage management software used to manage virtual infrastructure. An integer overflow vulnerability in this software could allow an attacker with network access to execute arbitrary code or cause system crashes, potentially compromising stored data or disrupting critical business operations.

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-2026-91755 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91755 being exploited in the wild.

**How severe is CVE-2026-91755?** 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 through 9.0.4-00.

**Is there a fix for CVE-2026-91755?** 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-2026-91755 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-91755?** 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

An integer overflow vulnerability exists in Hitachi Dynamic Link Manager for VMware that allows network-based exploitation without authentication or user interaction. The flaw enables attackers to achieve high confidentiality, integrity, and availability impact, though exploitation requires specific conditions (CVSS base score 8.1, attack complexity high). The vulnerability affects versions 8.7.3-00 through 9.0.4-00 and is fixed in version 9.0.4-01.

## Affected products

- Hitachi Dynamic Link Manager for VMware 8.7.3-00 through 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 OS command injection](https://junglewise.ai/threats/cve-2026-91756-os-command-injection-vulnerability-in-hitachi-dynamic-link)
- [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)