CyberSecBulletin
CVE-2026-91764NVD status: Deferred

Hitachi Dynamic Link Manager for Linux: Improper Link Resolution Before File Access

Published Updated By the CyberSecBulletin desk

CVE-2026-91764 is a high-severity improper link resolution before file access vulnerability in Hitachi Dynamic Link Manager for Linux from Hitachi, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists version 9.0.5-00 as the first without the flaw, so updating Hitachi Dynamic Link Manager for Linux to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.13% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Hitachi Dynamic Link Manager for Linux to 9.0.5-00 or a later version.
  2. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
HitachiHitachi Dynamic Link Manager for Linux6.1.1.-00 up to, but not including, 9.0.5-009.0.5-00

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
LowA basic user account is enough.
User interaction
RequiredA user must take an action such as opening a file or link.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
LowSome restricted data can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H. Scored by CNA (hitachi.co.jp).

Official description

Improper Link Resolution Before File Access Vulnerability in Hitachi Dynamic Link Manager for Linux. This issue affects Hitachi Dynamic Link Manager for Linux: from 6.1.1.-00 before 9.0.5-00.

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

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).

References

Other vulnerabilities in Hitachi Dynamic Link Manager for Linux

All Hitachi Dynamic Link Manager for Linux vulnerabilities

Recent Improper Link Resolution Before File Access vulnerabilities

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