Security readout for executives and security teams
Plain-English summary
Siemens syngo fastView can mishandle specially crafted BMP image files. If a user opens such a file, the application may allow code execution with that user’s permissions. The issue is high severity because it can affect confidentiality, integrity, and availability, but it requires local user interaction.
Executive priority
Treat as a high-priority workstation risk where syngo fastView is used. Urgency rises in environments receiving outside medical images or files, because exploitation depends on a user opening malicious BMP content.
Technical view
The BMP parser lacks proper validation of user-supplied data, creating a CWE-123 write-what-where condition. Siemens describes potential code execution in the current process. CVSS 3.1 is 7.8 with local attack vector, low complexity, no privileges, and required user interaction.
Likely exposure
Exposure is limited to environments where Siemens syngo fastView is installed. The source bundle states all versions are affected, but does not provide CPEs, deployment prevalence, or confirmed fixed versions.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. The CVSS temporal vector includes proof-of-concept maturity, but the provided sources do not establish real-world exploitation.
Researcher notes
Key evidence is Siemens’ description of improper BMP parsing and CWE-123 write-what-where behavior. The bundle does not include patch text, exploit details, or environmental indicators, so validation should focus on installation presence and vendor advisory status.
Mitigation direction
- Review Siemens Healthineers advisory SHSA-688797 for official fix or workaround details.
- Inventory syngo fastView installations and prioritize affected clinical or diagnostic workstations.
- Restrict opening BMP files from untrusted sources until vendor guidance is applied.
- Remove unnecessary syngo fastView installations where business use is not required.
- Run users with least privilege on systems using syngo fastView.
Validation and detection
- Confirm whether syngo fastView is installed on managed endpoints.
- Compare installed versions and advisory status against Siemens SHSA-688797.
- Identify workflows where users open externally supplied BMP files.
- Review endpoint telemetry for unexpected syngo fastView crashes or suspicious process behavior.
- Document compensating controls where vendor remediation is not yet applied.
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
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ATT&CK lookup starting points
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CWE-123: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-45465 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
CNA and ADP enrichment extracted from CVE v5
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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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
Source materials
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.
Write-what-where Condition
Write-what-where Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.