Security readout for executives and security teams
Plain-English summary
CVE-2021-37198 affects Siemens COMOS Web components. Its CSRF protection is flawed, so a victim using COMOS Web could be tricked into causing unintended actions in the application. The CVSS score is high because successful abuse could affect confidentiality, integrity, and availability.
Executive priority
Treat as high priority for environments where COMOS Web supports engineering or operational workflows. Prioritize asset identification and vendor-aligned remediation because compromise could affect sensitive data and operational integrity.
Technical view
The issue is CWE-352 cross-site request forgery in COMOS Web for specified COMOS V10.2, V10.3, and V10.4 versions when web components are used. The CVSS vector is AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, requiring user interaction but no attacker privileges.
Likely exposure
Exposure is limited to Siemens COMOS deployments using COMOS Web components: V10.2 all versions, V10.3 before V10.3.3.3, and V10.4 before V10.4.1.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Abuse would require a user interaction scenario consistent with CSRF, not direct unauthenticated takeover.
Researcher notes
Evidence supports a CSRF flaw in COMOS Web with high CVSS impact. The bundle does not provide exploit details, observed exploitation, or complete remediation text for every affected branch, so validation should stay focused on version, web-component use, and Siemens advisory guidance.
Mitigation direction
- Inventory COMOS versions and confirm whether COMOS Web components are enabled.
- Upgrade COMOS V10.3 to V10.3.3.3 or later where applicable.
- Upgrade COMOS V10.4 to V10.4.1 or later where applicable.
- For COMOS V10.2, check Siemens guidance for supported remediation options.
- Reduce COMOS Web exposure until vendor-guided remediation is complete.
Validation and detection
- Verify installed COMOS version against the affected version ranges.
- Confirm whether web components are deployed or reachable.
- Review Siemens advisory SSA-995338 for environment-specific remediation guidance.
- Check logs and change history for suspicious user-initiated actions.
- Confirm remediated systems are no longer in the listed affected ranges.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2021-37198 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:N/UI:R/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:N/UI:R/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:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/pdf/ssa-995338.pdfCVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.