CVE-2026-28269Network attack vector

Privilege escalation via command-output path redirection

Published Feb 26, 2026 · Updated Feb 26, 2026

OS command injection in Kiteworks Core before 9.2.0 allows remote authenticated users to overwrite arbitrary files via output redirection. The command execution functionality accepts a user-controlled output destination and redirects command output there without constraining the file path. The vendor does not identify the required role or exact command endpoint; overwriting critical system files grants elevated access without a reported service interruption.

CVSS severity5.9
Medium
EPSS probability1.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Kiteworks Core before 9.2.0 allows remote authenticated users to overwrite arbitrary files via output redirection. The command execution functionality accepts a user-controlled output destination and redirects command output there without constraining the file path. The vendor does not identify the required role or exact command endpoint; overwriting critical system files grants elevated access without a reported service interruption.

The record

CVE
CVE-2026-28269
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Kiteworks
Product
Kiteworks Core
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kiteworks · Kiteworks Coreversion=< 9.2.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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