CVE-2026-26222 — CRITICAL (9.8)

Vulnerability Description

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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Beyond	Altec Doclink	4.0.336.0

Related Weaknesses (CWE)

CWE-918 CWE-502

References

https://doclinkai.com/Product
https://www.vulncheck.com/advisories/doclink-net-remoting-unauthenticated-arbitrThird Party AdvisoryVDB Entry

FAQ

What is CVE-2026-26222?

CVE-2026-26222 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.s...

How severe is CVE-2026-26222?

CVE-2026-26222 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-26222?

Check the references section above for vendor advisories and patch information. Affected products include: Beyond Altec Doclink.