High severity · published Sep 30, 2026
CVE-2026-102126
Kiteworks Core Stored Cross-site Scripting (XSS)
8.1
CVSS
0.3%
EPSS
No
On KEV
Description
A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an administrator holding only a single, narrowly scoped delegated permission to store crafted content that later executes arbitrary JavaScript in the authenticated session of a System Administrator who views the affected page. This could have permitted the lower-privileged administrator to escalate to full administrative control of the tenant, including the creation of a new administrative account.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Core · Kiteworks
before 9.5.1 · source: vendor
KI
Kiteworks · Accellion
before 9.5.1 · source: NVD
Affected product
CO
Core
Kiteworks
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