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CVE-2026-102455 – Unauthenticated Remote Code Execution via Insecure Deserialization – Digiwin EasyF

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Summary

CVE-2026-102455 is a critical insecure deserialization vulnerability (CWE-502) affecting Digiwin EasyFlow .NET, a workflow automation platform. Unauthenticated remote attackers can send maliciously crafted serialized content to the server, resulting in arbitrary code execution. The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical) and a CVSS v4.0 score of 9.3 (Critical), reflecting network-based exploitability with no authentication or user interaction required.

Technical details

  • Root cause: The application deserializes untrusted, attacker-supplied serialized content without adequate validation, allowing crafted payloads to trigger arbitrary code execution during the deserialization process.
  • Trigger conditions: An attacker submits specially crafted serialized data to a network-exposed EasyFlow .NET endpoint; no valid credentials or prior access are required.
  • Attack vector: Network — the flaw is remotely exploitable over standard network access to the exposed service.
  • Impact: Full compromise of confidentiality, integrity, and availability, as the attacker can execute arbitrary code on the server hosting EasyFlow .NET.

Affected software

  • Digiwin EasyFlow .NET V6.1.x (all versions)
  • Digiwin EasyFlow .NET V6.6 through V6.6.19
  • Digiwin EasyFlow .NET V8.1 through V8.1.5

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVSS v4.0 Base Score: 9.3 (Critical) — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: Update to the Digiwin EasyFlow .NET patch version released after April 16, 2026.
  • If patching is not immediately possible: Restrict network access to EasyFlow .NET instances (e.g., remove direct internet exposure, place behind a VPN or firewall allow-list) and monitor for anomalous inbound requests until the patch can be applied.

References

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