Integer Overflow Vulnerability in Hitachi Dynamic Link Manager for VMware
Hitachi Dynamic Link Manager for VMware versions 8.7.3-00 through 9.0.4-00 are covered by this integer overflow flaw. The fix is in 9.0.4-01.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 9.0.4-01
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 9.0.4-01.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.31% · 24th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 26/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
Hitachi Dynamic Link Manager for VMware contains an integer overflow flaw that can be reached remotely over the network without logging in. Its description does not state what an attacker gains from it, so no specific impact is given here.
Read the original description
Integer Overflow Vulnerability in Hitachi Dynamic Link Manager for VMware.
This issue affects Hitachi Dynamic Link Manager for VMware: from 8.7.3-00 before 9.0.4-01.
Who should check
Teams running Hitachi Dynamic Link Manager for VMware from 8.7.3-00 through 9.0.4-00
cve.now Index
- Exploitation0/40No signal
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity9.1/10CVSS 8.1, total technical impact per CISA
- No patch0/5No signal
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
- Would score about 31 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 9.0.4-01.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-91755 (Integer Overflow Vulnerability in Hitachi Dynamic Link Manager for VMware), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-91755 (entry last updated 2026-11-10): Affected: - Hitachi Hitachi Dynamic Link Manager for VMware: from 8.7.3-00, fixed in 9.0.4-01 Fixed versions: 9.0.4-01. Conditions (all must be true for the bug to be hit): - Hitachi Dynamic Link Manager for VMware in versions 8.7.3-00 to 9.0.4-00 (source: https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-161/index.html) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, no login, no user action. CISA KEV: CVE-2026-91755 is not listed as of cve.now's last read. This KEV status is for CVE-2026-91755 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-161/index.html Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-91755 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-91755.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Hitachi Hitachi Dynamic Link Manager for VMware
From 8.7.3-00 · fixed in 9.0.4-01
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-91755
Is CVE-2026-91755 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
This is an integer overflow flaw in Hitachi Dynamic Link Manager for VMware. An integer overflow happens when a calculation produces a number too large for the space allocated to hold it, which can make the software behave in unintended ways.Source: hitachi.com
Which versions are affected by CVE-2026-91755?
Hitachi Dynamic Link Manager for VMware: from 8.7.3-00 before 9.0.4-01.Source: cve.now feed data
Am I affected, and how do I check?
The conditions list Hitachi Dynamic Link Manager for VMware versions 8.7.3-00 to 9.0.4-00. To check an installed copy, compare its version against that range.Source: hitachi.com
How do I fix CVE-2026-91755?
Upgrade to Hitachi Dynamic Link Manager for VMware 9.0.4-01 or later, which is the fixed version.Source: hitachi.com