No exploitation reportedFix available

CVE-2025-53900

Q: Is CVE-2025-53900 actively exploited?

Active exploitation of CVE-2025-53900 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2025-53900?

CVE-2025-53900 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2025-11-29
Fixed in9.1.0
WeaknessCWE-267

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Kiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, an unfavourable definition of roles and permissions in Kiteworks MFT on managing Connections could lead to unexpected escalation of privileges for authorized users. This issue has been patched in version 9.1.0.

Timeline

dates in UTC

2025-11-2903:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-53900?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-53900?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Accellion kiteworks managed file transfer

Branch	Affected	Fixed in	Source
9.1	< 9.1.0	9.1.0	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Accellion kiteworks managed file transfer to 9.1.0

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-12-01
OpenCVESSVC decisionnone—
CNACVSS 3.16.5read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-267read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2025-11-29
Last Modified: 2026-10-07
NVD status: Analyzed

Frequently asked questions

What is CVE-2025-53900?

Is CVE-2025-53900 actively exploited?

Active exploitation of CVE-2025-53900 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-53900?

CVE-2025-53900 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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