CVE-2021-43355Network attack vector

Service-privilege access via client-side authentication bypass

Published Jan 21, 2022 · Updated Apr 16, 2025

Improper authentication in Fresenius Kabi Vigilant Master Med before 2.0.1.3 allows remote attackers to obtain service privileges. The Mastermed Dashboard validates login input only in client-side JavaScript, while the server fails to authenticate the submitted data independently. Exploitation requires knowledge of the service user; published vendor reporting identifies no interrupted infusion or exposure of PII or PHI.

CVSS severity7.3
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Fresenius Kabi Vigilant Master Med before 2.0.1.3 allows remote attackers to obtain service privileges. The Mastermed Dashboard validates login input only in client-side JavaScript, while the server fails to authenticate the submitted data independently. Exploitation requires knowledge of the service user; published vendor reporting identifies no interrupted infusion or exposure of PII or PHI.

The record

CVE
CVE-2021-43355
Published
Jan 21, 2022
Updated
Apr 16, 2025
Vendor
Fresenius Kabi
Product
Vigilant Software Suite – Vigilant Master Med
Classifications
CWE-603, CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record 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=unspecified <2.0.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fresenius Kabi · Vigilant Software Suite – Vigilant Master Medversion=unspecified <2.0.1.3

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-603Use of Client-Side Authentication
CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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