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CVE-2026-102099 Kiteworks Core arbitrary file write

High 7.2 Published Updated

Authenticated administrators can write arbitrary files via path traversal in the export feature, potentially leading to command execution on the host.

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-2026-102099?

CVE-2026-102099 is a high-severity path traversal vulnerability in Accellion Kiteworks, published on 30 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Kiteworks Core before version 9.5.0 is vulnerable to Arbitrary File Write. An improper restriction of a user-supplied file path in a Kiteworks administrative export feature could allow an authenticated administrator to write a file to an arbitrary location on the underlying host, potentially leading to command execution on the appliance. Exploitation requires an existing, authenticated administrative account with access to the affected export function.

Weakness: CWE-22

Which versions are affected by CVE-2026-102099?

It affects 1 product.

Products include Accellion Kiteworks.

How do I fix CVE-2026-102099?

No fix has been published for CVE-2026-102099 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-102099 being exploited?

There is no known exploitation of CVE-2026-102099 in the wild and no public exploit code.

All Accellion Kiteworks vulnerabilities

Sources

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