Security readout for executives and security teams
Plain-English summary
CVE-2021-33005 affects mySCADA myPRO before version 8.20.0. A remote unauthenticated attacker could upload files into unintended directories, creating a serious integrity risk for industrial control environments using the product.
Executive priority
Treat this as a high-priority remediation item for environments running mySCADA myPRO, particularly industrial or operational systems. Prioritize upgrading exposed or safety-adjacent deployments first.
Technical view
The issue is a CWE-22 path traversal in mySCADA myPRO. The CVSS vector indicates network access, low complexity, no privileges, and no user interaction, with high integrity impact and no stated confidentiality or availability impact.
Likely exposure
Exposure is likely where mySCADA myPRO versions earlier than 8.20.0 are reachable over a network, especially from untrusted segments or the internet. The bundle does not identify affected CPEs or exact vulnerable builds beyond prior to 8.20.0.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Risk remains meaningful because the vulnerability is remotely reachable, unauthenticated, and low complexity, but exploitation status should not be assumed beyond the cited sources.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, CISA advisory reference, and mySCADA 8.20.0 security update reference. No exploit details, public exploitation confirmation, or granular affected-version list is provided in the bundle.
Mitigation direction
- Upgrade mySCADA myPRO to version 8.20.0 or later.
- Review the mySCADA security update and CISA advisory for vendor-specific guidance.
- Inventory deployments before deciding any compensating controls are sufficient.
- Restrict untrusted network reachability where operationally possible.
Validation and detection
- Identify all mySCADA myPRO instances and record installed versions.
- Confirm no production instance runs a version earlier than 8.20.0.
- Review application directories for unexpected uploaded or modified files.
- Check vendor and CISA advisories for any updated detection guidance.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-33005 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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:N/I:H/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.