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Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-8403

MEDIUM · 6.1 CVSS v3.1 Published 2026-06-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges 7 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Eksagate Electronic Engineering and Computer Industry Trade Inc. SYSGUARD 6001 allows Stored XSS. This issue affects SYSGUARD 6001: from 2.0.2 before 6.1.4.0.  NOTE: The vendor was contacted and it was learned that the product is not supported.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

SYSGUARD 6001 contains a stored cross-site scripting (XSS) vulnerability where user-supplied input is not properly neutralized during web page generation. This allows attackers to inject malicious scripts that persist on the server and execute in the browsers of other users who view affected pages. The vulnerability affects versions 2.0.2 through versions before 6.1.4.0.

MitigationSince the vendor no longer supports this product, immediate remediation options are limited. Consider deploying a WAF with XSS filtering rules, isolating the application network segment, or replacing the product with a supported alternative.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm SYSGUARD 6001 is installed
    Check for SYSGUARD 6001 in installed programs on Windows or package managers on Linux. Also verify if the web service is running by checking common ports such as 80, 443, or 8080.
    Affected if SYSGUARD 6001 web interface is accessible on the network
  2. Identify the installed version
    Access the SYSGUARD web interface and locate the version number. It is typically displayed in the page footer, about section, or system information panel. If command-line access is available, check the binary or service version details.
    Affected if Unable to retrieve the version number from the web interface or system
  3. Compare version against affected range
    The affected versions are 2.0.2 through any version before 6.1.4.0. Check if your installed version falls within this range. Versions starting at 6.1.4.0 or later are not affected.
    Affected if Installed version is 2.0.2 or higher but lower than 6.1.4.0
  4. Identify user input points in the web interface
    Explore the SYSGUARD web application for fields that accept user input, such as device names, labels, user profile information, or configuration parameters. These are the locations where malicious scripts could be stored.
    Affected if The web interface contains user-editable fields that persist data

If SYSGUARD 6001 is running and the version is 2.0.2 or higher but lower than 6.1.4.0, the stored XSS vulnerability is present in the affected web pages.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since the vendor no longer supports this product, immediate remediation options are limited. Consider deploying a WAF with XSS filtering rules, isolating the application network segment, or replacing the product with a supported alternative.

Recommended fix High confidence
  1. The vendor has stated the product is not supported, therefore no official fix path exists.
  2. Consider replacing SYSGUARD 6001 with a supported alternative product.
  3. If continued use is required, implement a Web Application Firewall (WAF) to help detect and block XSS attacks.
  4. Implement input validation and output encoding at the network level (e.g., reverse proxy) as a compensating control.
  5. Restrict network access to the affected system to minimize exposure.
Caveat No upgrade path available as the product is end-of-life/not supported

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-8403 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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