CVE-2026-84859 Scada-LTS CVE debrief

Who should care

Defenders responsible for ScadaLTS instances should assess exposure and prioritize verification of the presence of this vulnerability in their environment. This includes reviewing the /api/events/search endpoint's accessibility and ensuring that only authorized users have access. Additionally, defenders should consider the potential operational impacts of a successful exploit, such as arbitrary data extraction and potential disruption of service. It is

Why it matters

CVE-2026-84859 is a MEDIUM-severity vulnerability in ScadaLTS 2.8.1-release-candidate build 0 that allows authenticated users to perform blind SQL injection. Defenders should prioritize verifying the presence of this vulnerability in their ScadaLTS instances and restrict access to the /api/events/search endpoint.

• Authenticated users with ROLE_USER can perform blind SQL injection
• Arbitrary data extraction from the database is possible
• Password hashes of all users can be extracted

Technical summary

The /api/events/search endpoint in ScadaLTS 2.8.1-release-candidate build 0 accepts a JSON body containing a sortBy array, which is concatenated directly into the SQL ORDER BY clause without sanitization or parameterization. This allows authenticated users with the ROLE_USER role to perform time-based and boolean-based blind SQL injection to extract arbitrary data from the database, including password hashes of all users.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their ScadaLTS instances and restrict access to the /api/events/search endpoint.

Recommended defensive actions

• Verify the presence of ScadaLTS 2.8.1-release-candidate build 0 in your environment
• Restrict access to the /api/events/search endpoint
• Monitor for suspicious activity on the /api/events/search endpoint
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is confirmed by the CVE Program record and the NVD vulnerability detail page. The Tenable security research report provides additional details about the vulnerability. The report highlights that the /api/events/search endpoint is accessible to any authenticated user with ROLE_USER, ROLE_ADMIN, or ROLE_PUBLIC via POST /api/events/search as defined in spring-security.xml. The CVE record was published on 2026-09-16T15:18:00.653Z and has not been modified since then. The information provided by these sources confirms the

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.