Security readout for executives and security teams
Plain-English summary
mySCADA myPRO 8.20.0 and earlier used MD5 to store passwords. If an attacker has obtained the stored password hashes, MD5 makes offline cracking more practical, potentially exposing user credentials.
Executive priority
Treat as high priority for operational technology environments using mySCADA myPRO. Focus first on exposure inventory, vendor guidance, and credential rotation where hash access is plausible.
Technical view
The issue is CWE-916: insufficient computational effort in password hashing. CVSS 3.1 score is 7.5 high, with high confidentiality impact. The source description ties practical impact to previously retrieved password hashes.
Likely exposure
Organizations running mySCADA myPRO 8.20.0 or earlier are the likely exposure group, especially where attackers could access backups, databases, exports, or other stored credential material.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation risk depends on attackers first obtaining password hashes, then cracking them offline.
Researcher notes
Evidence is limited to the CVE description and CISA reference. Do not assume a public exploit, active exploitation, or a specific patch unless confirmed in vendor or CISA guidance.
Mitigation direction
- Inventory mySCADA myPRO deployments and identify versions 8.20.0 or earlier.
- Review CISA and vendor guidance for fixed versions or compensating controls.
- Restrict access to myPRO management interfaces and credential storage locations.
- Rotate affected credentials if password hashes may have been retrieved.
- Monitor logs for suspicious access to user or credential data.
Validation and detection
- Confirm installed mySCADA myPRO versions against the affected 8.20.0-and-prior range.
- Review whether password hashes were exposed through backups, databases, exports, or logs.
- Check for unexpected access to credential stores or administrative interfaces.
- Verify remediation guidance directly with mySCADA or the CISA advisory.
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-916: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-43989 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:H/I:N/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:N/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:H/I:N/A:N
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.
Use of Password Hash With Insufficient Computational Effort
Use of Password Hash With Insufficient Computational Effort represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.