Hitachi Dynamic Link Manager for Windows: Improper Link Resolution Before File Access
CVE-2026-86578 is a high-severity improper link resolution before file access vulnerability in Hitachi Dynamic Link Manager for Windows from Hitachi, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with administrator privileges, without any action from a user. The record lists version 9.0.4-01 as the first without the flaw, so updating Hitachi Dynamic Link Manager for Windows to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.17% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Hitachi Dynamic Link Manager for Windows to 9.0.4-01 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Hitachi | Hitachi Dynamic Link Manager for Windows | 5.0.0-03 up to, but not including, 9.0.4-01 | 9.0.4-01 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:H. Scored by CNA (hitachi.co.jp).
Official description
Link Following Vulnerability in Hitachi Dynamic Link Manager for Windows. This issue affects Hitachi Dynamic Link Manager for Windows: from 5.0.0-03 before 9.0.4-01.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Link Resolution Before File Access
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
How developers prevent this class of flaw
- Follow the principle of least privilege when assigning access rights to entities in a software system. Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
More Improper Link Resolution Before File Access vulnerabilities (CWE-59)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
References
Other vulnerabilities in Hitachi Dynamic Link Manager for Windows
- 8.2 High severity
Recent Improper Link Resolution Before File Access vulnerabilities
- 7.8 High severity
- 7.0 High severity
- 7.0 High severity
- 8.1 High severity
- 8.1 High severity
- 7.7 High severity
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