CVE-2026-23751 Kofax Capture 6.0.0.0 Unauthenticated File Read/Write & SMB Coercion via .NET Remoting
Unauthenticated attackers can exploit .NET Remoting to read/write files, coerce authentication, and potentially execute code on Kofax Capture servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23751?
CVE-2026-23751 is a critical unsafe deserialization vulnerability in Tungsten Capture (formerly Kofax Capture), published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-23751?
How do I fix CVE-2026-23751?
No fix has been published for CVE-2026-23751 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-23751 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23751 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-pc62-x5ww-3xm5.