Security readout for executives and security teams
Plain-English summary
mySCADA myPRO has a critical flaw in its firmware update feature. A remote attacker may inject operating system commands through a specific parameter, potentially taking control of the affected system. The source bundle does not show confirmed active exploitation.
Executive priority
Treat this as urgent for any exposed industrial or SCADA environment. The severity is critical because successful exploitation may allow system-level command execution without authentication or user interaction.
Technical view
CVE-2021-43984 is CWE-78 command injection in mySCADA myPRO versions 8.20.0 and prior. The CVSS 3.1 score is 10.0: network-accessible, low complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where mySCADA myPRO is reachable over a network, especially from untrusted segments. Asset owners should verify whether any myPRO deployment is version 8.20.0 or earlier.
Exploitation context
The provided sources describe a remotely reachable command injection path but do not provide evidence of exploitation in the wild. The CVE is not marked as CISA KEV in the supplied bundle.
Researcher notes
Evidence is limited to the CVE bundle and CISA advisory reference. The affected statement says myPRO versions 8.20.0 and prior; the bundle also lists affected product versions as all, so confirm scope with vendor guidance.
Mitigation direction
- Identify all mySCADA myPRO instances and their versions.
- Prioritize systems running version 8.20.0 or earlier.
- Review CISA and vendor guidance for supported updates or mitigations.
- Restrict network access to myPRO management and firmware update interfaces.
- Monitor affected systems for unexpected configuration or operating system activity.
Validation and detection
- Confirm myPRO version information from asset inventory or system administration interfaces.
- Check whether firmware update functionality is reachable from untrusted networks.
- Review logs for unusual update attempts or administrative activity.
- Validate network controls limit access to authorized management hosts.
- Track remediation status against each identified myPRO instance.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter 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 lookupCVE-2021-43984 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
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-355-01CVE reference · x_refsource_MISC
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.