How severe is CVE-2021-43935?

CVE-2021-43935 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43935?

CVE-2021-43935 primarily affects Baxter Welch Allyn Connex Cardio. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43935?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43935 published?

CVE-2021-43935 was published on 2021-12-15 and last updated on 2026-06-17.

CVE-2021-43935

CVE-2021-43935 is a high-severity vulnerability in Baxter Welch Allyn Connex Cardio with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Baxter Welch Allyn Connex Cardio
Published: 2021-12-15
Last modified: 2026-06-17

Description

The impacted products, when configured to use SSO, are affected by an improper authentication vulnerability. This vulnerability allows the application to accept manual entry of any active directory (AD) account provisioned in the application without supplying a password, resulting in access to the application as the supplied AD account, with all associated privileges.

Frequently asked questions

What is CVE-2021-43935?: The impacted products, when configured to use SSO, are affected by an improper authentication vulnerability. This vulnerability allows the application to accept manual entry of any active directory (AD) account provisioned in the application without supplying a password, resulting in access to the application as the supplied AD account, with all associated privileges.
How severe is CVE-2021-43935?: CVE-2021-43935 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43935?: CVE-2021-43935 primarily affects Baxter Welch Allyn Connex Cardio. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43935 published?: CVE-2021-43935 was published on 2021-12-15 and last updated on 2026-06-17.

References

https://www.cisa.gov/uscert/ics/advisories/icsma-21-343-01

Affected products (7)

cpe:2.3:a:baxter:welch_allyn_connex_cardio:*:*:*:*:*:*:*:*
cpe:2.3:a:baxter:welch_allyn_diagnostic_cardiology_suite:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:baxter:welch_allyn_rscribe_resting_ecg_system:*:*:*:*:*:*:*:*
cpe:2.3:a:baxter:welch_allyn_vision_express_holter_analysis_system:*:*:*:*:*:*:*:*
cpe:2.3:o:baxter:welch_allyn_hscribe_holter_analysis_system_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:baxter:welch_allyn_q-stress_cardiac_stress_testing_system_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:baxter:welch_allyn_xscribe_cardiac_stress_testing_system_firmware:*:*:*:*:*:*:*:*

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