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Kiteworks Core CVE-2026-102096

| EUVDEUVD-2026-90379 HIGH
OS Command Injection (CWE-78)
2026-09-30 cisa-cg
7.2
CVSS 3.1 · Vendor: cisa-cg
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain admin credentials
  2. Delivery
    Authenticate to admin console
  3. Exploit
    Upload crafted config package
  4. Execution
    Insufficient validation processes contents
  5. Persist
    OS executes injected commands (elevated)
  6. Impact
    Full appliance compromise

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires an authenticated Kiteworks administrator account with access to the configuration-package upload feature of the appliance's admin interface (PR:H). Exploitation is performed by supplying a crafted configuration package whose contents bypass the insufficient validation and are processed into OS command execution. Limiting factors: administrator-level authentication is mandatory (no unauthenticated path), no user interaction by a second party is needed (UI:N), and it affects Kiteworks Core appliances running versions before 9.5.0. The high-privilege prerequisite is the dominant constraint - this is realistically a post-compromise or malicious/compromised-admin scenario rather than opportunistic remote exploitation.

Impact

The vendor CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, 7.2 High) is internally consistent and I concur with it. This is genuine OS command injection (CWE-78) yielding full C:H/I:H/A:H impact on the appliance, but it is strongly gated by PR:H: only an authenticated administrator can upload the configuration package that triggers arbitrary command execution. That gating is what separates this from a critical bug - the pre-condition (admin access) largely presupposes the attacker already controls the appliance's management plane. No EPSS score, no CISA KEV listing, and no public POC were provided, so exploitation status is 'no public exploit identified at time of analysis.' There is no signal conflict: the network vector is consistent with a web-based admin upload interface, and PR:H matches the description's 'authenticated administrator' language. Real-world priority is LOW-to-MEDIUM: high technical impact but a narrow, high-privilege prerequisite and no evidence of active or automated exploitation. Primary residual risk is as a post-authentication privilege/persistence step (admin → root/host command execution) or when admin credentials are phished, reused, or the admin account is a lower-trust delegated role.

Exploit ScenarioDerived

An attacker who has obtained Kiteworks administrator credentials (via phishing, credential reuse, or an insider) logs into the appliance's admin console and uploads a maliciously crafted configuration package. Because the package contents are not sufficiently validated before processing, embedded payload data is passed to the underlying OS, executing arbitrary commands potentially with elevated privileges. No public exploit code was identified at the time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 1.7% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 30, 2026

OS command injection in Kiteworks Core appliances running versions before 9.5.0 allows an authenticated administrator to upload a configuration package whose contents are not sufficiently validated, resulting in arbitrary operating-system command execution that may run with elevated privileges on the underlying appliance. The attack requires a valid administrator account with access to the configuration-package upload functionality in the administrative interface (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, 7.2 High), so the high-privilege prerequisite is the dominant constraint and the realistic scenario is a malicious, compromised, or coerced administrator rather than opportunistic unauthenticated remote exploitation; the assessed vector is internally consistent and concurred with. No public exploit code and no confirmed active exploitation were identified at time of analysis, and successful exploitation yields full compromise of confidentiality, integrity, and availability on the affected appliance.

RemediationAI

Vendor-released patch: upgrade Kiteworks Core to version 9.5.0 or later, which is the fixed release identified by the advisory; consult https://github.com/kiteworks/security-advisories/security/advisories/GHSA-c3wx-5mx6-2qpg for the authoritative upgrade guidance and any release notes accompanying 9.5.0. Until the upgrade can be applied, the highest-value compensating control is to enforce strict least privilege and strong, phishing-resistant multi-factor authentication on all accounts holding administrative rights, since the vulnerability is only reachable with administrator-level access - the trade-off is operational friction for administrative staff and the need for reliable account-recovery procedures. Administrators should also temporarily restrict or disable the configuration-package upload/import feature in the admin interface if that capability is not operationally required, accepting the loss of that functionality as the trade-off, and tightly limit administrative interface reachability to trusted management networks or VPN-only segments, which reduces exposure but does not eliminate the risk from an already-compromised admin account. Because exploitation is a post-authentication, admin-driven action, log and alert on configuration-package uploads and on process execution spawned by the Core application, terminate all active administrative sessions and rotate credentials if an unauthorized upload is suspected, and treat any successful exploitation as a full host compromise requiring reimaging of the appliance rather than simple credential rotation.

Affected VersionsENISA

core 0 <9.5.0

Affected Packages

euvd core fix: 9.5.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is an OS command injection (CWE-78) rooted in insufficient validation of the contents of an uploaded configuration package on Kiteworks Core appliances. Rather than a memory-safety or injection-in-query issue, the root cause is that untrusted input originating from an administrative upload workflow reaches an operating-system command execution sink without adequate sanitization, neutralizing, or allow-listing of the package's contents. Because the affected component is the appliance's configuration import/processing path, the injected commands execute in the context of the underlying operating system rather than merely within the application, which is why the advisory notes execution potentially with elevated privileges. The CPE cpe:2.3:a:kiteworks:core:*:*:*:*:*:*:*:* confirms the affected product is Kiteworks Core itself, with the wildcard version indicating all releases below the fixed 9.5.0 line. The CVSS vector's PR:H reflects that the attacker must already hold administrative rights on the platform, meaning this weakness primarily erodes the boundary between application-level administration and host-level control rather than providing a route from unauthenticated network access to code execution.

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Severity by source

Vendor (cisa-cg) PRIMARY 7.2 HIGH
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 7.2 HIGH

Network-reachable admin upload (AV:N), no special complexity (AC:L), requires admin privileges (PR:H), no second-party interaction (UI:N); command injection yields full host C/I/A.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (cisa-cg).

CVSS VectorVendor: cisa-cg

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch available
Sep 30, 2026 - 21:04 EUVD
CVE Published
Sep 30, 2026 - 20:07 cve.org
HIGH 7.2

DescriptionCVE.org

Kiteworks Core before version 9.5.0 is vulnerable to OS Command Injection that allows an authenticated administrator to upload a configuration package whose contents were not sufficiently validated before being processed. A crafted package could cause the underlying system to execute arbitrary operating-system commands, potentially with elevated privileges, on the affected appliance.

Technical POC Analysis

Evidence limitation: the supplied material is the GitHub advisory (GHSA-c3wx-5mx6-2qpg) only.

Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.

Executive ViewAI

Why It Matters

Kiteworks Core appliances running versions before 9.5.0 are exposed to a high-severity OS command injection that an authenticated administrator could use to fully compromise the appliance's confidentiality, integrity, and availability. Organizations relying on Kiteworks for secure file transfer and content collaboration should care because a malicious, compromised, or coerced administrator could disrupt critical data flows and access sensitive information. There is no public exploit identified at time of analysis, and no vendor-released patch identified at time of analysis, so risk must be managed through access controls and monitoring.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis; interim mitigations include restricting administrative interface and configuration-package upload to trusted networks and least-privileged accounts, enforcing MFA, disabling or tightly monitoring configuration upload if not essential, auditing and alerting on administrative actions, segmenting affected Kiteworks Core appliances, maintaining offline backups, and monitoring vendor advisories for a fixed release.

Threat Intelligence Overview

EPSS Score
1.7%
Top 24% exploitable
Prevalence
Medium
enterprise secure file-transfer/MFT appliance, common but not ubiquitous
Data Quality
6 sources
Confidence: High

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.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 1.7%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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