Security readout for executives and security teams
Plain-English summary
CVE-2021-43981 is a critical command-injection issue in mySCADA myPRO’s email-sending feature. An unauthenticated network attacker may be able to make the system run operating system commands through a specific parameter. For industrial or operational environments, that can mean loss of confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any exposed mySCADA myPRO environment. The worst-case impact is complete system compromise, and OT disruption could affect operations. Prioritize asset identification, exposure reduction, and vendor-guided remediation before routine maintenance windows where feasible.
Technical view
The source describes CWE-78 OS command injection in mySCADA myPRO versions 8.20.0 and prior. CVSS 3.1 is 10.0 with AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H, indicating unauthenticated remote exploitation potential and full impact across confidentiality, integrity, and availability.
Likely exposure
Organizations running mySCADA myPRO, especially versions 8.20.0 and prior, are the relevant exposure group. Risk is highest where the application or its email-related functionality is reachable from untrusted networks. The bundle does not provide asset-discovery indicators, ports, or deployment-specific details.
Exploitation context
The provided bundle does not show CISA KEV listing or cited evidence of active exploitation. The risk remains severe because the vulnerability is unauthenticated, network-reachable, low-complexity, and can lead to operating system command execution.
Researcher notes
Evidence is limited to the CVE bundle and CISA advisory URL. The description names versions 8.20.0 and prior, while affected metadata says All; validate against the vendor advisory. Do not assume active exploitation, exploit maturity, or a specific patch unless confirmed by vendor guidance.
Mitigation direction
- Check mySCADA and CISA guidance for fixed versions or vendor-approved mitigations.
- Remove public internet exposure for mySCADA myPRO interfaces.
- Restrict access to trusted administrative networks and VPNs.
- Review whether the email feature can be disabled safely.
- Prioritize patching or compensating controls for operational technology deployments.
Validation and detection
- Inventory all mySCADA myPRO deployments and record exact versions.
- Identify whether any deployment is version 8.20.0 or prior.
- Confirm whether myPRO interfaces are reachable from untrusted networks.
- Review vendor advisories for remediation status and affected-version clarification.
- Look for unexpected command execution or email-feature activity in relevant logs.
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-2021-43981 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.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.