CVE-2026-26222CWE-502CWE-918

DocLink .NET Remoting Unauthenticated Arbitrary File Read/Write RCE

Critical · published February 24, 2026

CVSS v4.0
10.0
EPSS
2%
Percentile
77.7
In the wild
Unconfirmed
What it is

Altec DocLink (now maintained by Beyond Limits Inc.) version 4.0.336.0 exposes insecure .NET Remoting endpoints over TCP and HTTP/SOAP via Altec.RDCHostService.exe using the ObjectURI "doclinkServer.soap". The service does not require authentication and is vulnerable to unsafe object unmarshalling, allowing remote attackers to read arbitrary files from the underlying system by specifying local file paths. Additionally, attackers can coerce SMB authentication via UNC paths and write arbitrary files to server locations. Because writable paths may be web-accessible under IIS, this can result in unauthenticated remote code execution or denial of service through file overwrite.

The record
Technical detail
CVSS v4.0
10.0 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.01749 · 77.7th percentile
Weaknesses
CWE-502 · Deserialization of Untrusted Data; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-02-24T17:33Z
EPSS history
Timeline
  • 24 FEB 17:33Z
    DocLink .NET Remoting Unauthenticated Arbitrary File Read/Write RCE
    cvelistv5