Cyber Posture

CVE-2026-28269

MediumRCE

Published: 26 February 2026

Published
26 February 2026
Modified
03 March 2026
KEV Added
—
Patch
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CVSS Score 5.9 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0003 8.5th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-28269 is a medium-severity OS Command Injection (CWE-78) vulnerability in Accellion Kiteworks. Its CVSS base score is 5.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 8.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 2 other techniques.
Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
Why these techniques?

OS command injection (CWE-78) in network-accessible Kiteworks app enables Unix shell command execution via output redirection to overwrite system files for privilege escalation.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Kiteworks is a private data network (PDN). Prior to version 9.2.0, avulnerability in Kiteworks command execution functionality allows authenticated users to redirect command output to arbitrary file locations. This could be exploited to overwrite critical system files and gain elevated…

more

access. Version 9.2.0 contains a patch.

Deeper analysisAI

CVE-2026-28269 affects Kiteworks, a private data network (PDN), in versions prior to 9.2.0. The vulnerability lies in the command execution functionality, where authenticated users can redirect command output to arbitrary file locations. Classified as CWE-78 (OS Command Injection), it has a CVSS v3.1 base score of 5.9 (AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N), indicating network accessibility but requiring high privileges and attack complexity.

High-privilege authenticated users can exploit this vulnerability over the network without user interaction. Successful exploitation allows overwriting critical system files, which could lead to elevated access on the affected system.

Kiteworks version 9.2.0 contains a patch addressing this issue. Additional details are available in the security advisory at https://github.com/kiteworks/security-advisories/security/advisories/GHSA-6j64-6fpp-9453.

Details

CWE(s)
CWE-78

Affected Products

accellion
kiteworks
≤ 9.2.0

CVEs Like This One

CVE-2026-23514Same product: Accellion Kiteworks
CVE-2026-23636Same product: Accellion Kiteworks
CVE-2026-28270Same product: Accellion Kiteworks
CVE-2026-29092Same product: Accellion Kiteworks
CVE-2026-28272Same product: Accellion Kiteworks
CVE-2026-24750Same product: Accellion Kiteworks
CVE-2025-13447Same product class: managed file transfer
CVE-2025-13444Same product class: managed file transfer
CVE-2026-27635Shared CWE-78
CVE-2020-36910Shared CWE-78

References