Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated nearby network actor bypass normal login controls on affected Philips IntelliBridge hubs. The main business risk is unauthorized change or disruption of systems used in clinical device connectivity, not data theft according to the CVSS vector.
Executive priority
Treat this as high priority where affected hubs support patient-care workflows. Prioritize inventory, network restriction, and vendor-guided remediation because the stated impacts are system integrity and availability, with no confirmed public exploitation in the provided sources.
Technical view
CVE-2021-33017 is a CWE-288 authentication bypass via alternate path or channel. CVSS 3.1 is 8.1, adjacent attack vector, low complexity, no privileges or user interaction, with high integrity and availability impact and no confidentiality impact.
Likely exposure
Exposure is most likely in healthcare or clinical networks where Philips IntelliBridge EC 40 or EC 80 hubs are deployed and reachable from adjacent network segments. The bundle description also mentions EC 60 and C.00.04 and prior, so model/version scope needs verification.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. The CVSS vector indicates an adjacent-network attacker could exploit without credentials or user interaction if they can reach the affected device path or channel.
Researcher notes
Evidence is limited to the CVE record and CISA ICS medical advisory reference. The bundle has a scope inconsistency: title and affected list name EC 40/EC 80, while description says EC 40/EC 60 C.00.04 and prior.
Mitigation direction
- Review Philips and CISA advisory guidance for supported updates or compensating controls.
- Inventory IntelliBridge EC 40 and EC 80 hubs and confirm firmware exposure.
- Restrict network access to hubs from only trusted clinical management segments.
- Monitor for unexpected configuration changes, service disruption, or unauthorized hub access.
- Validate any vendor-provided remediation in a maintenance window before production rollout.
Validation and detection
- Confirm deployed hub models and firmware versions against the advisory scope.
- Check whether hubs are reachable from adjacent or untrusted network segments.
- Review access control rules protecting hub management and integration interfaces.
- Verify monitoring covers integrity and availability events for affected hubs.
- Document any model mismatch, especially EC 60 versus EC 80 references.
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-288: 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-33017 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
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/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:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsma-21-322-01CVE 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.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.