CVE-2021-43935 | ICSMA-21-343-01 Hillrom Welch Allyn Cardio Products

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.

Published: 2021-12-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-43935 is rated Moderate Risk (45.3/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-43935

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.43% 0.19% -0.24%
2 2025-03-29 0.17% 0.43% +0.26%
3 2023-03-07 — 0.17% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-43935

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-43935

Affected software / configurations for CVE-2021-43935

Vendor Product Version Raw CPE
baxter welch_allyn_connex_cardio >= 1.0.0, <= 1.1.1 cpe:2.3:a:baxter:welch_allyn_connex_cardio:*:*:*:*:*:*:*:*
baxter welch_allyn_diagnostic_cardiology_suite 2.1.0 cpe:2.3:a:baxter:welch_allyn_diagnostic_cardiology_suite:2.1.0:*:*:*:*:*:*:*
baxter welch_allyn_rscribe_resting_ecg_system >= 5.01, <= 7.0.0 cpe:2.3:a:baxter:welch_allyn_rscribe_resting_ecg_system:*:*:*:*:*:*:*:*
baxter welch_allyn_vision_express_holter_analysis_system >= 6.1.0, <= 6.4.0 cpe:2.3:a:baxter:welch_allyn_vision_express_holter_analysis_system:*:*:*:*:*:*:*:*
baxter welch_allyn_hscribe_holter_analysis_system_firmware >= 5.01, <= 6.4.0 cpe:2.3:o:baxter:welch_allyn_hscribe_holter_analysis_system_firmware:*:*:*:*:*:*:*:*
baxter welch_allyn_q-stress_cardiac_stress_testing_system_firmware >= 6.0.0, <= 6.3.1 cpe:2.3:o:baxter:welch_allyn_q-stress_cardiac_stress_testing_system_firmware:*:*:*:*:*:*:*:*
baxter welch_allyn_xscribe_cardiac_stress_testing_system_firmware >= 5.01, <= 6.3.1 cpe:2.3:o:baxter:welch_allyn_xscribe_cardiac_stress_testing_system_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-43935

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsma-21-343-01 Mitigation Third Party Advisory US Government Resource
cvelogic Threat Intelligence