Paper/Archive/CVE-2026-26222

CVE-2026-26222

Beyond Limits Inc. Altec DocLink — DocLink .NET Remoting Unauthenticated Arbitrary File Read/Write RCE

CVSS 10.0 (CNA)10.0 / 10 × 3030.0 Not in CISA KEV+300.0 EPSS percentile 58.5.585 × 2011.7 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Altec DocLink4.0.336.0–CNA

Scores by source

VulnCheck (CNA)10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refdoclinkai.com writeupvulncheck.com/advisories/doclink-net-remoting-unauthenticated-arbitrary-file-read-write-rce