CVE-2021-43550

Adjacent-network sensitive-data exposure

Published Dec 27, 2021 · Updated Sep 16, 2024

Risky cryptography in Philips PIC iX and Efficia CM Series allows attackers to expose sensitive communications on the monitoring network. Philips has not disclosed which algorithm or protocol the affected PIC iX C.02 and C.03 and Efficia CM Series A.01 through C.0x and 4.0 use, or how it fails. Access to the medical-device network is required, and sensitive-data exposure is the established consequence.

CVSS severity5.9
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Risky cryptography in Philips PIC iX and Efficia CM Series allows attackers to expose sensitive communications on the monitoring network. Philips has not disclosed which algorithm or protocol the affected PIC iX C.02 and C.03 and Efficia CM Series A.01 through C.0x and 4.0 use, or how it fails. Access to the medical-device network is required, and sensitive-data exposure is the established consequence.

The record

CVE
CVE-2021-43550
Published
Dec 27, 2021
Updated
Sep 16, 2024
Vendor
Philips
Product
Efficia CM Series
Classifications
CWE-327, CAPEC-97, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0
  2. Affected versionversion=A.01 <=C.0x

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Philips · Efficia CM Seriesversion=4.0; version=A.01 <=C.0x
Philips · Patient Information Center iX (PIC iX)version=C.02; version=C.03

Published CVSS scores

5.9ICS-CERTCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
3.3NIST NVDAV:A/AC:L/Au:N/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
CAPEC-97Cryptanalysis
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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