EasyFlow .NET has 5 vulnerabilities affecting multiple versions, including critical flaws that can lead to code execution, data disclosure, file
The announcement released on 2026-09-30, TVN-202609012, states that Digiwin Smart Intelligence EasyFlow .NET has 5 vulnerabilities, corresponding to CVE-2026-102455, CVE-2026-102456, CVE-2026-102457, CVE-2026-102458, and CVE-2026-102459. The announcement indicates that the affected versions include EasyFlow .NET V6.1.x and earlier, V6.6.19 and earlier, and V8.1.5 and earlier. This event covers Critical, High, and Medium risk levels, showing that the product contains exploitable security gaps across multiple attack surfaces.
From the structure of the announcement, these 5 vulnerabilities are not a single defect, but are distributed across core functions such as authentication, data access, file reading, and input handling. This means an attacker does not need to rely on a single exploit chain and may instead cause disruption, data leakage, or remote code execution through different entry points. For enterprises, such an announcement, which combines high-privilege impact and low-barrier attack surfaces, usually means patching must be treated as the highest priority.
CVE-2026-102455 is an Insecure Deserialization issue. The announcement states that an unauthenticated remote attacker can execute arbitrary code on the server by sending malicious serialized content. The risk of this type of vulnerability is that if serialized data is not strictly validated, it may transform “data” into “executable objects,” allowing the attacker to turn input directly into execution privileges.
CVE-2026-102456 is a SQL Injection issue. An authenticated remote attacker can inject arbitrary SQL statements to read database contents. The announcement indicates that the impact is focused on disclosure of database contents, meaning the attacker must at least pass authentication, but once successful may gain direct access to important data assets behind the application.
CVE-2026-102457 is an Arbitrary File Read issue. An authenticated remote attacker can use this vulnerability to download arbitrary system files. This means the attacker may break through the normal application-layer data boundary and further access configuration files, credentials, log files, or other system files, creating risks of lateral movement or privilege escalation.
CVE-2026-102458 is a Missing Authentication issue. The announcement states that an unauthenticated remote attacker can obtain other users’ plaintext passwords through a specific API. This is a very serious failure in data protection, because the problem is not only whether data can be accessed, but that sensitive credential content is directly exposed, which may lead to account takeover and subsequent impersonation.
CVE-2026-102459 is a Reflected Cross-site Scripting issue. An unauthenticated remote attacker can use phishing attacks to execute arbitrary JavaScript code in the user’s browser. Such vulnerabilities are commonly triggered when a victim clicks a malicious link. Although user interaction is required, it can still be used to induce logins, steal session information, or carry out further social engineering operations.
From the CVSS scores, CVE-2026-102455 and CVE-2026-102458 are both Critical, showing that both the attack conditions and the impact are severe. CVE-2026-102456 and CVE-2026-102457 are High, while CVE-2026-102459 is Medium; this combination means the threat surface includes both “directly remotely exploitable” and “exploitable only with privileges or interaction” types. The patching strategy should not address only the highest-scoring items, but should complete the overall update at once.
According to the announcement, the affected product is EasyFlow .NET, and the versions covered are V6.1.x and earlier, V6.6.19 and earlier, and V8.1.5 and earlier. This means organizations still running these versions may be exposed simultaneously to remote code execution, database reading, arbitrary file download, sensitive information leakage, and browser-side script execution.
If the system is exploited, the direct consequences may include: takeover of application services, theft of database contents, leakage of system files, exposure of users’ plaintext passwords, and insertion of malicious scripts into users’ browsers. For systems with workflow, forms, approval, or internal data integration functions, these consequences may further spread to internal accounts, business data, and other connected systems.
Because the announcement clearly distinguishes between authenticated and unauthenticated attackers, the practical risk should be viewed as both “externally directly scannable and exploitable” and “expanded damage after internal account abuse.” Especially for items involving plaintext passwords and arbitrary code execution, if they are not patched promptly, they may form a long chain of incidents rather than a single point vulnerability.
First, immediately update the patches according to the remediation schedule provided in the announcement: for CVE-2026-102455, update to a version after 2026/04/16; for CVE-2026-102456 and CVE-2026-102459, update to a version after 2026/06/26; for CVE-2026-102457, update to a version after 2026/04/20; for CVE-2026-102458, update to a version after 2026/04/17. If multiple affected versions exist in the environment, a complete upgrade and verification should be performed, to avoid only fixing one defect while leaving other entry points open.
Second, inventory all EasyFlow .NET deployment instances and confirm whether test, backup, or idle hosts are still running older components. Many vulnerability incidents spread not because the main system was not patched, but because side systems, development environments, or historical nodes were not updated in sync.
Third, strengthen audits of modules involving login, APIs, and file downloads, especially authentication logic, authorization logic, and input handling. For interfaces suspected of SQL Injection and XSS risk, increase log observability to help track abnormal parameters, unusual request rates, and suspicious sources.
Fourth, for credentials and files that may have leaked, start password rotation and sensitive data inventory at the same time. If the system has been exposed to risks of the CVE-2026-102458 type, reset the passwords of affected accounts first, and check for signs of abnormal logins or credential abuse.
Fifth, front-end users should avoid clicking unknown links directly, and additional protection and monitoring should be added for entry points that may be affected by reflected XSS. Although the announcement does not provide more detailed exploitation conditions, reducing phishing success and reducing the chance of script execution remain necessary temporary controls before the high-risk vulnerabilities are fully patched.
5-Step Patch Checklist