Tungsten Automation Kofax Capture 6.0.0.0 Ascent Capture Service missing authentication

Summaryinfo

A vulnerability was found in Tungsten Automation Kofax Capture 6.0.0.0. It has been declared as critical. This impacts an unknown function of the component Ascent Capture Service. The manipulation results in missing authentication. This vulnerability was named CVE-2026-23751. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in Tungsten Automation Kofax Capture 6.0.0.0. Affected is some unknown processing of the component Ascent Capture Service. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Kofax Capture, now referred to as Tungsten Capture, version 6.0.0.0 (other versions may be affected) exposes a deprecated .NET Remoting HTTP channel on port 2424 via the Ascent Capture Service that is accessible without authentication and uses a default, publicly known endpoint identifier. An unauthenticated remote attacker can exploit .NET Remoting object unmarshalling techniques to instantiate a remote System.Net.WebClient object and read arbitrary files from the server filesystem, write attacker-controlled files to the server, or coerce NTLMv2 authentication to an attacker-controlled host, enabling sensitive credential disclosure, denial of service, remote code execution, or lateral movement depending on service account privileges and network environment.

The weakness was presented by Victor A. Morales. The advisory is shared for download at gist.github.com. This vulnerability is traded as CVE-2026-23751 since 01/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/23/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-25228). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Automation Software

Vendor

• Tungsten Automation

Name

• Kofax Capture

Version

• 6.0.0.0

License

• commercial

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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