Key points
- CVE-2026-113404 affects Uniong WebITR versions up to 2_1_0_34.
- The flaw has a CVSS score of 8.7, rated as high severity.
- Attackers need valid authentication credentials to exploit the vulnerability.
Uniong WebITR contains a deserialization flaw that allows remote attackers to execute arbitrary code on the server. According to the National Vulnerability Database, this issue affects all versions of the software up to and including 2_1_0_34. The vulnerability is tracked as CVE-2026-113404 and stems from insecure handling of serialized data within the application’s core processing logic.
The exploit mechanism relies on a hard-coded cryptographic key embedded within the software. An authenticated remote attacker can use this known key to craft malicious serialized payloads. When the application processes these crafted inputs, it deserializes the data without sufficient validation, leading to arbitrary code execution on the underlying server system. This creates a direct path for system compromise by any user with valid login credentials.
Technical Context
The weakness is classified under CWE-502, which denotes insecure deserialization. This category of vulnerability arises when applications deserialize untrusted data without verifying its integrity or authenticity. In this specific case, the presence of a hard-coded key removes a layer of security that would normally protect the deserialization process. Attackers do not need to steal or guess a secret key; they only need to understand the serialization format and possess valid user authentication tokens to proceed with the attack.
Affected Environments
Organizations running Uniong WebITR are exposed to this risk if they have not updated beyond version 2_1_0_34. Any installation using an older version remains vulnerable to exploitation by authenticated users. The high CVSS score of 8.7 reflects the severe impact of remote code execution capabilities. System administrators must verify their current version numbers immediately to determine if their environments fall within the affected range.
Next steps
Administrators should inventory all instances of Uniong WebITR to identify those running vulnerable versions. Teams must focus on limiting the attack surface. Restricting network access to the application to trusted internal ranges can reduce the likelihood of remote exploitation. Additionally, enforcing strict least-privilege principles for user accounts may mitigate the impact if an attacker manages to execute code, as lower-privilege accounts have fewer system capabilities.
Signals worth monitoring
Teams usually detect this type of activity by reviewing application logs for unusual deserialization errors or unexpected process spawns. Check whether authenticated users are submitting unusually large or malformed data payloads. Monitor for outbound connections from the web server to unknown external IP addresses, which may indicate command-and-control communication. Look for new files or scripts appearing in temporary directories, as attackers often drop tools during exploitation. Review authentication logs for accounts that have recently accessed sensitive endpoints, as these are prime targets for abuse.
What to do and how to stay safe: Uniong
- Audit all Uniong WebITR installations to confirm if the version is 2_1_0_34 or older.
- Restrict network access to the application to limit exposure to untrusted networks.
- Monitor server processes for unexpected executions that do not match normal application behavior.
- Prepare to isolate affected servers from the network once the vendor provides an update.
Step-by-step guide: Emergency Patching Checklist for Critical System Fixes
General security guidance from the SecOps Monitor newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is the CVSS score for CVE-2026-113404?
The CVSS score is 8.7, which is rated as high severity.
Which versions of Uniong WebITR are affected?
All versions up to and including 2_1_0_34 are affected by this vulnerability.
Do attackers need authentication to exploit this flaw?
Yes, the source material states that authenticated remote attackers can exploit this vulnerability.
