CVE-2025-53899Network attack vector

Admin-required privilege escalation via misdirected upstream channel

Published Nov 29, 2025 · Updated Dec 1, 2025

Incorrect channel destination handling in Kiteworks MFT before 9.1.0 allows remote authenticated users to intercept upstream traffic. The back-end directs an upstream communication channel to the wrong destination; Kiteworks has not disclosed the affected subcomponent or destination-selection logic. Exploitation requires administrative privileges and certain undisclosed circumstances, and the resulting interception can escalate privileges.

CVSS severity7.2
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect channel destination handling in Kiteworks MFT before 9.1.0 allows remote authenticated users to intercept upstream traffic. The back-end directs an upstream communication channel to the wrong destination; Kiteworks has not disclosed the affected subcomponent or destination-selection logic. Exploitation requires administrative privileges and certain undisclosed circumstances, and the resulting interception can escalate privileges.

The record

CVE
CVE-2025-53899
Published
Nov 29, 2025
Updated
Dec 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-941, T1557
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2GitHub CNACVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-941Incorrectly Specified Destination in a Communication Channel
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo