Security readout for executives and security teams
Plain-English summary
CVE-2021-33013 affects mySCADA myPRO before version 8.20.0. An unauthenticated network attacker could read sensitive system information without permission. For industrial environments, that exposure can support reconnaissance and operational risk even without direct service disruption.
Executive priority
Treat this as a high-priority remediation item for any exposed myPRO deployment. The business concern is unauthorized visibility into sensitive industrial system information, which can help an attacker plan further compromise.
Technical view
The issue is improper access control, mapped to CWE-284. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N, indicating remote, unauthenticated access with high confidentiality impact and limited integrity impact. The provided affected range is myPRO prior to 8.20.0.
Likely exposure
Exposure is most relevant where mySCADA myPRO is reachable over a network, especially from untrusted segments. The sources do not provide deployment-specific exposure data, CPEs, or affected configurations beyond versions prior to 8.20.0.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Risk is still meaningful because the flaw is remotely reachable, requires no credentials, and can disclose sensitive system information.
Researcher notes
The public data is concise. It identifies unauthorized read access to sensitive system information but does not specify endpoints, data types, prerequisites beyond the CVSS vector, or proof-of-concept status. Avoid assuming broader code execution or availability impact.
Mitigation direction
- Upgrade mySCADA myPRO to version 8.20.0 or later where applicable.
- Review mySCADA and CISA guidance for environment-specific remediation instructions.
- Restrict myPRO access to trusted management and operations networks.
- Remove any unnecessary internet exposure for myPRO services.
- Monitor for unusual unauthenticated access or information-read activity.
Validation and detection
- Inventory all mySCADA myPRO installations and owners.
- Confirm installed myPRO versions; flag anything earlier than 8.20.0.
- Map network paths to myPRO from user, vendor, and external networks.
- Verify the update is applied and access controls still enforce authorization.
- Review logs for suspicious access before and after remediation.
Public sources used
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2021-33013 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
- High
- CVSS
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
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:L/A:N3.94.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-217-03CVE reference · x_refsource_MISC
- https://www.myscada.org/version-8-20-0-released-security-updateCVE reference · x_refsource_CONFIRM
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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.