Is CVE-2025-53939 actively exploited?

CVE-2025-53939 has no public evidence of in-the-wild exploitation as of 2025-12-04.

What is the CVSS score for CVE-2025-53939?

CVE-2025-53939 has a CVSS score of 6.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

How do I patch CVE-2025-53939?

Patch guidance is available from accellion security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-53939.

Which products are affected by CVE-2025-53939?

1 product: accellion kiteworks.

CVE-2025-53939 - remediation guidance & executive summary

Description

Kiteworks is a private data network (PDN). Prior to version 9.1.0, improper input validation when managing roles of a shared folder could lead to unexpectedly elevate another user's permissions on the share. This issue has been patched in version 9.1.0.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: low
Weaknesses: CWE-20 · Improper Input ValidationNVD-CWE-noinfo

Metadata

Primary Vendor: ACCELLION
Published: 11/29/2025
Last Modified: 12/4/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-53939

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary