Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network actor crash the AVEVA SuiteLink server, disrupting availability. The public data describes an availability-only issue, not data theft or tampering. It matters most where affected AVEVA products support operational technology or plant workflows.
Executive priority
Treat as high priority for operational environments because the issue can interrupt service without authentication. It is less severe than data compromise, but downtime in industrial or production contexts can still create material business impact.
Technical view
CVE-2021-32987 is a CWE-476 null pointer dereference in AVEVA SuiteLink server while processing command 0x0b. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating remote, low-complexity, unauthenticated denial of service with high availability impact.
Likely exposure
Exposure is likely limited to environments running the listed AVEVA products: System Platform 2020, InTouch 2020, Historian 2020, Communication Drivers Pack 2020, Batch Management 2020, or MES 2014. Risk increases if SuiteLink services are reachable from untrusted networks.
Exploitation context
The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. The CVSS vector indicates exploitation requires network reachability but no credentials or user interaction. Public evidence here supports denial of service, not code execution.
Researcher notes
The public bundle is concise and does not include version-specific patch details beyond the AVEVA bulletin reference. Analysis should stay scoped to denial of service against SuiteLink server in the listed AVEVA products unless vendor materials provide more detail.
Mitigation direction
- Review AVEVA Security Bulletin AVEVA-2021-003 for official update or mitigation guidance.
- Inventory listed AVEVA products and identify systems running SuiteLink server functionality.
- Restrict SuiteLink network access to trusted operational and management networks.
- Prioritize remediation for production systems where availability loss affects operations.
- Monitor AVEVA support channels for version-specific fixes and compensating controls.
Validation and detection
- Confirm whether any affected AVEVA product versions are deployed in the environment.
- Map which hosts expose SuiteLink server functionality over the network.
- Check whether SuiteLink access is limited to trusted network segments.
- Review monitoring for unexplained SuiteLink crashes or availability interruptions.
- Document vendor bulletin status and remediation decisions for each affected asset.
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-476: 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 lookupCVE-2021-32987 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:N/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:U/C:N/I:N/A:H3.93.6Primary 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:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2021-003.pdfCVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.