Security readout for executives and security teams
Plain-English summary
This flaw affects cryptography used between Philips patient monitoring systems. In the wrong network position, an attacker could expose sensitive information and potentially affect some communication integrity. It is not listed as known exploited in the supplied sources, but the clinical context makes exposure review important.
Executive priority
Treat as a targeted healthcare technology risk, not a broad internet emergency. Prioritize hospitals using the named Philips products because sensitive patient information may be exposed.
Technical view
CVE-2021-43550 is CWE-327 in Philips PIC iX C.02/C.03 communications with Efficia CM Series A.01-C.0x and 4.0. CVSS 3.1 is 5.9: adjacent-network, high complexity, no privileges, no user interaction, high confidentiality impact, low integrity impact, no availability impact.
Likely exposure
Likely exposure is limited to healthcare environments running the affected Philips PIC iX and Efficia CM combinations, especially where monitoring communications are reachable from adjacent networks.
Exploitation context
The provided bundle does not show active exploitation, and KEV is false. The CVSS vector indicates exploitation requires adjacent-network positioning and high complexity, with confidentiality as the primary concern.
Researcher notes
Evidence is limited to the CVE record and CISA advisory reference in the bundle. Do not assume internet exposure, public exploit availability, or a specific patch unless confirmed in vendor guidance.
Mitigation direction
- Identify affected Philips PIC iX and Efficia CM deployments and versions.
- Check Philips and CISA guidance for vendor-supported updates or compensating controls.
- Restrict adjacent network access to patient monitoring communications.
- Monitor clinical network paths for unusual access to affected communications.
Validation and detection
- Inventory PIC iX versions C.02 and C.03 in clinical environments.
- Inventory Efficia CM Series revisions A.01 to C.0x and 4.0.
- Confirm whether affected systems communicate across reachable adjacent network segments.
- Document vendor guidance status, applied updates, and remaining compensating controls.
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
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CWE-327: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-43550 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
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/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:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N1.64.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsma-21-322-02CVE 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 a Broken or Risky Cryptographic Algorithm
Use of a Broken or Risky Cryptographic Algorithm represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.