Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as delegated role-management admin
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DeliveryOpen user-provisioning interface
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ExploitAssign system-administrator role to controlled account
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ExecutionServer skips entitlement check
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ImpactGain full sysadmin on appliance
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V8 - Authorization Privilege assignment review
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| Exploitation Conditions | Requires an authenticated Kiteworks Core administrator whose delegated permissions include role changes (user-provisioning/role management) but who is NOT intended to grant the system-administrator role. Exploitation is performed through the user-provisioning interface, which fails to verify the requester is entitled to grant the role being assigned. Limiting factors: the attacker must already possess valid privileged (delegated-admin) credentials/session (PR:H), so this is not exploitable by anonymous or ordinary-user accounts; environments that do not use scoped/delegated admin roles have no meaningful trust boundary to cross. No user interaction is required (UI:N). |
| Impact | This is a genuine privilege-escalation flaw but a LOW-to-MEDIUM operational priority, not a high-urgency issue despite the 7.2 (HIGH) score. The vendor CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H is well-founded and I concur: the PR:H is the decisive limiter - exploitation requires an already-authenticated administrator who holds delegated role-management permissions, so this is a trust-boundary/least-privilege failure among privileged operators rather than an externally reachable break-in. There is no EPSS score, no CISA KEV listing, and no public exploit identified at time of analysis, so all real-world-exploitation signals are absent; risk is bounded to environments that deploy delegated/scoped administrator roles and trust those delegates less than full sysadmins. The network attack vector (AV:N) reflects the web management interface but does not lower the authentication bar. The C:H/I:H/A:H triad is justified because escalation to full system-administrator yields total control of the Kiteworks appliance. No signals conflict; the main caveat is a mislabeled tag (see data_quality_flags) - the 'Information Disclosure' tag understates this, which is a full privilege-escalation/takeover primitive. |
| Exploit ScenarioDerived | An organization delegates limited administrative duties - such as managing user roles - to a helpdesk or team lead, expecting they cannot create super-admins. That delegated administrator uses the user-provisioning interface to assign the full system-administrator role to an account they control, and because the interface never checks whether the requester is entitled to grant that role, the assignment succeeds and yields complete appliance takeover. No public exploit code is available, and the attacker must already hold an authenticated delegated-admin session (PR:H). |
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Alert meAnalysisAIv1 – Sep 30, 2026
Privilege escalation in Kiteworks Core allows a delegated administrator whose scope includes role changes to promote an account to full system-administrator through the user-provisioning interface, which fails to verify that the requester is entitled to grant the role being assigned (CWE-266). The CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, 7.2 High) confirms the flaw is network-reachable but requires high-privileged, delegated-admin credentials and no user interaction, so anonymous or ordinary-user accounts cannot exploit it and environments without scoped admin roles have no trust boundary to cross. No public exploit identified at time of analysis and no KEV listing; independent assessment rates this a genuine but low-to-medium operational priority rather than a high-urgency issue.
RemediationAI
Apply the fixed Kiteworks Core release identified in vendor advisory GHSA-4gcf-w86v-34rp and the corroborating CISA CSAF advisory va-26-274-01; the input data does not specify an exact patched version number, so the vendor advisory must be consulted for the version to upgrade to. Where immediate patching is not possible, the most effective compensating control is to remove the standalone role-change permission from delegated administrator profiles, either by eliminating scoped admin accounts that can modify roles or by narrowing them so role assignment is bundled with and constrained by full user-provisioning entitlements; the trade-off is that helpdesk and onboarding workflows relying on delegated role assignment must be rerouted through a full administrator or a supervised process. Also inventory every account holding delegated role-management rights and enable or retain audit logging on user-provisioning and role-change events so an unexpected promotion to system administrator is detected; monitoring alone does not prevent exploitation and should be treated as a detection layer rather than a fix.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Technical ContextAI · show details
Kiteworks Core is a managed file transfer and content-governance platform that supports delegated (scoped) administration, allowing a full administrator to hand subsets of management capability to other accounts. The flaw lives in that delegation model: one delegable scope is the ability to change user roles via the user-provisioning interface, and the affected code path authenticates the caller and checks that the caller holds a role-management grant, but never verifies that the specific role being assigned falls within that grant. This is a textbook CWE-266 (Incorrect Privilege Assignment) authorization gap, where the check covers the action taken rather than the privilege level granted, letting a narrowly scoped admin assign the system-administrator role and thereby escape the delegation boundary. The CVSS vector is scope-unchanged (S:U) with high confidentiality, integrity and availability impact once the promotion succeeds, because the resulting account is a full system administrator of the Kiteworks instance. The CPE entry cpe:2.3:a:kiteworks:core:*:*:*:*:*:*:*:* carries a wildcard version, indicating the advisory is written against the product as a whole rather than a bounded release line, so administrators should treat their installed version as affected until the vendor advisory states otherwise.
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Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Requires an authenticated delegated administrator (PR:H) over the network web interface (AV:N) with no interaction; escalation to full sysadmin yields complete control, so C/I/A all High.
Primary rating from Vendor (cisa-cg).
CVSS VectorVendor: cisa-cg
Lifecycle Timeline
2DescriptionCVE.org
A user-provisioning interface in Kiteworks Core did not verify that the requesting administrator was entitled to grant the role being assigned. An administrator whose delegated permissions covered role changes alone could therefore raise an account to full system-administrator privileges.
Technical POC Analysis
The flaw is CWE-266 (Incorrect Privilege Assignment).
Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.
Executive ViewAI
A privilege-escalation flaw in Kiteworks Core lets a delegated administrator with role-management scope elevate an account to full system administrator, collapsing the separation-of-duties controls that organizations rely on to keep delegated administration contained. Any enterprise running Kiteworks with scoped or delegated admin roles is exposed, and a successful abuse would give an insider or compromised admin account unrestricted control over the content-governance platform, including sensitive file-sharing data and its user base. Exploitation requires pre-existing high-privilege access and no public exploit code or active exploitation has been identified, so leadership should treat this as a contained, medium-priority governance gap rather than an emergency.
No vendor-released patch identified at time of analysis. Interim mitigations: revoke or restrict role-assignment permissions from delegated administrator accounts, enforce least privilege and reduce the number of scoped admins, require multi-factor authentication and just-in-time approval for administrative role changes, monitor and alert on user-provisioning and privilege-grant events, and confirm with Kiteworks whether configuration hardening or a hotfix is available.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Unauthenticated attackers who know a target's email address can take over Kiteworks Core accounts that use locally store
Improper certificate-assignment controls in Kiteworks Email Protection Gateway allow a remote, unauthenticated attacker
Stored cross-site scripting in Kiteworks Core (all versions prior to 9.5.0) enables unauthenticated attackers to persist
Authentication bypass in Kiteworks Email Protection Gateway (versions before 9.5.0) lets unauthenticated remote attacker
Server-side request forgery in Kiteworks Email Protection Gateway (versions before 9.5.0) lets a remote, unauthenticated
Server-side request forgery in Kiteworks Email Protection Gateway before 9.5.0 allows a remote, unauthenticated sender t
Unauthenticated server-side request forgery in Kiteworks Email Protection Gateway before version 9.5.0 lets a remote att
Server-side request forgery in Kiteworks Email Protection Gateway before 9.5.0 allows a remote, unauthenticated attacker
Server-side request forgery in Kiteworks Email Protection Gateway (all versions before 9.5.0) lets a remote, unauthentic
Command injection in Kiteworks Core's internal cluster-management function allows an attacker who already has code execu
Sandbox escape in Kiteworks Core's document-conversion feature (CVE-2026-102125, CVSS 8.8) allows code already executing
Authenticated privilege escalation in Kiteworks PDN (the Accellion-line private data network) before version 9.1.0 lets
EUVD-2026-90288
NVD
CVE.org
EPSS
Vulnrichment
GitHub
Exploit-DB