What is CVE-2026-2621?

CVE-2026-2621 is a high-severity vulnerability in Sciyon Koyuan Thermoelectricity Heat Network Management System, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-02-17.

How severe is CVE-2026-2621?

High severity. CVSS v3 base score is 7.3 out of 10.

SQL Injection in Sciyon Koyuan Thermoelectricity Heat Network Management System

CVE-2026-2621

A security vulnerability has been detected in Sciyon Koyuan Thermoelectricity Heat Network Management System 3.0. This affects an unknown part of the file /SISReport/WebReport20/Proxy/AsyncTreeProxy.aspx. The manipulation of the argument PGUID leads to sql injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Sciyon Koyuan Thermoelectricity Heat Network Management System — versions 3.0

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-2621?: CVE-2026-2621 is a high-severity vulnerability in Sciyon Koyuan Thermoelectricity Heat Network Management System, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-02-17.
How severe is CVE-2026-2621?: High severity. CVSS v3 base score is 7.3 out of 10.