Security readout for executives and security teams
Plain-English summary
CVE-2021-33008 is a high-severity authentication failure in AVEVA System Platform. A function that should require a provable user identity does not properly authenticate that identity, creating risk to confidentiality, integrity, and availability in affected deployments.
Executive priority
Treat this as a high-priority OT platform risk. It affects identity enforcement around critical functionality and carries high potential business impact, but the provided evidence does not confirm active exploitation.
Technical view
The issue is CWE-306, missing authentication for a critical function, in AVEVA System Platform versions 2017 through 2020 R2 P01. The CVSS 3.1 score is 8.8, with network attack vector, low complexity, low privileges, no user interaction, and high impact across CIA.
Likely exposure
Exposure is most likely where AVEVA System Platform versions 2017 through 2020 R2 P01 remain in use, especially if reachable over internal or external networks. The supplied data does not identify specific modules, configurations, or CPEs.
Exploitation context
The source bundle does not show CISA KEV listing or cite active exploitation. The CVSS vector indicates network reachability, low attack complexity, and no user interaction, but low privileges are required.
Researcher notes
Key unknowns are the exact unauthenticated function, affected component boundaries, and vendor-fixed versions. Use AVEVA and CISA advisories as authoritative sources before testing, and avoid assuming exploitation details beyond the CVSS and CWE data.
Mitigation direction
- Identify all AVEVA System Platform deployments and versions.
- Review AVEVA Security Bulletin AVEVA-2021-002 for vendor-approved fixes.
- Review CISA ICSA-21-180-05 for official mitigation guidance.
- Restrict network reachability while remediation is assessed.
- Prioritize remediation for production OT environments.
Validation and detection
- Confirm whether any deployment runs versions 2017 through 2020 R2 P01.
- Map network paths to affected AVEVA System Platform systems.
- Verify remediation status against AVEVA’s official bulletin.
- Check security monitoring for unexpected access to affected functions.
- Document compensating controls if patch status is incomplete.
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-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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-2021-33008 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-180-05CVE reference · x_refsource_CONFIRM
- https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2021-002.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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.