CVE-2026-28270 Kiteworks Core has an Unrestricted Upload of File with Dangerous Type
Malicious administrators can upload arbitrary files due to missing validation, potentially leading to code execution on the Kiteworks platform.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-28270?
CVE-2026-28270 is a medium-severity vulnerability in Accellion Kiteworks, published on 27 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration allows uploading of arbitrary files without proper validation. Malicious administrators could exploit this to upload unauthorized file types to the system. Version 9.2.0 contains a patch for the issue.
Weakness: CWE-434
Which versions are affected by CVE-2026-28270?
It affects 1 product.
Products include Accellion Kiteworks.
How do I fix CVE-2026-28270?
No fix has been published for CVE-2026-28270 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-28270 being exploited?
There is no known exploitation of CVE-2026-28270 in the wild and no public exploit code.
Other vulnerabilities in Accellion Kiteworks
- CVE-2026-102115 Kiteworks Core Authentication Bypass in the Password Reset Workflow
- CVE-2026-102149 Kiteworks Email Protection Gateway Improper Access Control
- CVE-2026-102147 Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS)
- CVE-2026-102095 Kiteworks Email Protection Gateway server-side request forgery
- CVE-2026-102102 Kiteworks Email Protection Gateway server-side request forgery