CVE-2026-26222Network attack vector

Unauthenticated file access via unsafe object unmarshalling

Published Feb 24, 2026 · Updated Feb 24, 2026

Unsafe deserialization in Beyond Limits DocLink 4.0.336.0 allows remote attackers to read and write files through .NET Remoting. Altec.RDCHostService.exe exposes the doclinkServer.soap ObjectURI over TCP and HTTP/SOAP without authentication and unmarshals attacker-controlled objects that specify local or UNC paths. Any reachable endpoint permits arbitrary file reads, SMB credential coercion, and file writes; code execution requires a writable IIS-served path, while overwriting other files can interrupt service.

CVSS severity10.0
Critical
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Beyond Limits DocLink 4.0.336.0 allows remote attackers to read and write files through .NET Remoting. Altec.RDCHostService.exe exposes the doclinkServer.soap ObjectURI over TCP and HTTP/SOAP without authentication and unmarshals attacker-controlled objects that specify local or UNC paths. Any reachable endpoint permits arbitrary file reads, SMB credential coercion, and file writes; code execution requires a writable IIS-served path, while overwriting other files can interrupt service.

The record

CVE
CVE-2026-26222
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Beyond Limits Inc.
Product
DocLink
Classifications
CWE-918, CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.336.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Beyond Limits Inc. · DocLinkversion=4.0.336.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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