Is CVE-2026-8403 in the CISA KEV catalog?

No. CVE-2026-8403 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8403?

CVE-2026-8403 has a CVSS v3 base score of 6.1 (MEDIUM).

How do I fix or mitigate CVE-2026-8403?

No published fix for CVE-2026-8403 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-8403

MEDIUM

6.1

CVSS v3

NVD

Description

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

EPSS data unavailable for this CVE.

References

Other references1

siberguvenlik.gov.tr

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.