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CVE-2026-102147

Accellion Kiteworks cross-site scripting (XSS)

9.3 CRITICALEPSS 0.45%
  1. Published30 Sept 2026

Description

A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an unauthenticated attacker to store crafted content that later executes arbitrary JavaScript in the authenticated session of an administrator who views the affected page. This could have permitted the attacker to gain full administrative control, including the creation of a new administrative account.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

Accellion Kiteworks< 9.5.1

Remediation

Fixed in
Accellion Kiteworks≥ 9.5.1

References

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Frequently asked

Is CVE-2026-102147 being actively exploited?

CVE-2026-102147 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.45%.

How severe is CVE-2026-102147?

CVE-2026-102147 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.45% probability of exploitation.

Which products are affected by CVE-2026-102147?

Affected products include Accellion Kiteworks.

How do I fix CVE-2026-102147?

Upgrade affected software to a fixed version, for example Accellion Kiteworks 9.5.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-102147 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.