CVE-2026-2621
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceSQL injection vulnerability in Sciyon Koyuan Thermoelectricity Heat Network Management System 3.0's AsyncTreeProxy.aspx file. The PGUID parameter is not properly sanitized, allowing remote attackers to inject malicious SQL queries. This is an authenticated SQL injection with public exploit code available.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the product versionCheck the application's version information through the help/about section, login page footer, or configuration files for Sciyon Koyuan Thermoelectricity Heat Network Management SystemAffected if The installed version is 3.0 or matches the affected version range for this system
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Verify vulnerable file existsLocate AsyncTreeProxy.aspx in the web application's file system or attempt to access it via HTTP request to confirm presenceAffected if The AsyncTreeProxy.aspx file exists and is accessible via the web server
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Confirm authentication is enabledVerify that user authentication is configured and functional for the applicationAffected if The application accepts user credentials and provides authenticated access
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Check PGUID parameter handlingReview the application's handling of the PGUID parameter in AsyncTreeProxy.aspx to determine if parameterized queries are implementedAffected if The PGUID parameter does not use parameterized queries or prepared statements and accepts unsanitized user input
The environment is affected if it is running Sciyon Koyuan Thermoelectricity Heat Network Management System 3.0 with the AsyncTreeProxy.aspx file present and accessible, where the PGUID parameter accepts user input without proper SQL injection protection.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement parameterized queries/prepared statements for the PGUID parameter. Apply input validation and encoding. Consider deploying a WAF rule as interim protection until the code fix is applied.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-2621 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-2621 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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