Security readout for executives and security teams
Plain-English summary
CVE-2026-21410 is a critical SQL injection in InSAT MasterSCADA BUK-TS main web interface. The advisory says unauthenticated network attackers may be able to reach remote code execution. Organizations using this product should treat exposed systems as high-priority operational technology risk, especially if reachable from untrusted networks.
Executive priority
Treat this as urgent for any environment running MasterSCADA BUK-TS. Prioritize discovery, exposure reduction, and vendor follow-up. If systems are internet-facing or connected to broad corporate networks, escalate immediately to OT, security, and operations leadership.
Technical view
The issue is CWE-89 SQL Injection in the MasterSCADA BUK-TS web interface. The CVSS 3.1 score is 9.8 with AV:N/AC:L/PR:N/UI:N and high confidentiality, integrity, and availability impact. The source bundle lists all versions as affected. No specific patch or workaround is included in the provided sources.
Likely exposure
Highest exposure is any MasterSCADA BUK-TS instance with its web interface reachable from the internet, enterprise networks, vendors, or other untrusted segments. Because the vector is network, low complexity, and unauthenticated, network reachability is the key exposure condition.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked in CISA KEV. The risk is still serious because the advisory describes potential remote code execution through a vulnerable endpoint in an ICS product.
Researcher notes
Evidence is limited to the CVE record and CISA ICS advisory references. The bundle states all versions are affected, but does not provide a fixed version, named workaround, or exploitation evidence. Avoid assuming exploit availability or specific remediation beyond exposure reduction and vendor/CISA guidance.
Mitigation direction
- Identify all MasterSCADA BUK-TS deployments and owners.
- Restrict web interface access to trusted management networks only.
- Remove internet exposure where present.
- Apply vendor guidance or updates when InSAT publishes them.
- Monitor CISA ICS advisory updates for remediation details.
- Increase logging and review suspicious web-interface activity.
Validation and detection
- Confirm whether MasterSCADA BUK-TS is deployed in OT or support networks.
- Inventory product versions and exposed web interfaces.
- Check external and internal attack-surface records for reachable instances.
- Verify access controls limit the web interface to trusted users and networks.
- Review vendor and CISA advisories for newly published fixes.
- Document compensating controls if no vendor fix is available.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-21410 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.