How severe is CVE-2026-26222?

CVE-2026-26222 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-26222 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26222?

CVE-2026-26222 affects Beyond Altec Doclink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26222?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-26222 have an EU (EUVD) identifier?

Yes. CVE-2026-26222 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8549.

When was CVE-2026-26222 published?

CVE-2026-26222 was published on 2026-02-24 and last updated on 2026-06-17.

CVE-2026-26222

CVE-2026-26222 is a critical-severity vulnerability in Beyond Altec Doclink with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 10.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8549
Weakness: CWE-502
Affected product: Beyond Altec Doclink
Published: 2026-02-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-26222?: 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.
How severe is CVE-2026-26222?: CVE-2026-26222 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-26222 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26222?: CVE-2026-26222 affects Beyond Altec Doclink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26222?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-26222 have an EU (EUVD) identifier?: Yes. CVE-2026-26222 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8549.
When was CVE-2026-26222 published?: CVE-2026-26222 was published on 2026-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:beyond:altec_doclink:4.0.336.0:*:*:*:*:*:*:*

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