CVE-2026-26222
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
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.
Analysis
Insecure .NET Remoting deserialization in Altec DocLink (Beyond Limits) 4.0.336.0. Exposed TCP endpoints allow unauthenticated remote code execution via .NET Remoting deserialization attacks.
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Remediation
Within 24 hours: Inventory all systems running Altec DocLink 4.0.336.0 and isolate affected servers from untrusted networks. Within 7 days: Implement network segmentation to restrict access to Altec.RDCHostService.exe (TCP/HTTP-SOAP ports) to authorized users only, disable the doclinkServer.soap endpoint if operationally feasible, and deploy WAF rules to block malicious .NET Remoting requests. …
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External POC / Exploit Code
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