Vulnerability · Published Apr 23, 2026 · Assigned by VulnCheck
CVE-2026-23751Kofax Capture 6.0.0.0 Unauthenticated File Read/Write & SMB Coercion via .NET Remoting
Critical 9.8
In plain English
A critical-severity missing authentication in Tungsten Capture (formerly Kofax Capture) from Tungsten Automation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Tungsten Automation | Tungsten Capture (formerly Kofax Capture) | 6.0.0.0 |
Weakness: CWE-306, CWE-441 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://gist.github.com/VAMorales/3888941d6e5efdd4b2e673e999f68ca2 technical-description, exploit
- https://docshield.tungstenautomation.com/Portal/Products/en_US/KC/11.1.0-40hy9nfk91/KC.htm product
- https://www.vulncheck.com/advisories/kofax-capture-unauthenticated-file-read-write-smb-coercion-via-net-remoting third-party-advisory