How severe is CVE-2021-37166?

CVE-2021-37166 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-37166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37166?

CVE-2021-37166 affects Swisslog-healthcare Hmi-3 Control Panel Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37166?

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-2021-37166 published?

CVE-2021-37166 was published on 2021-08-02 and last updated on 2026-06-17.

CVE-2021-37166

CVE-2021-37166 is a high-severity vulnerability in Swisslog-healthcare Hmi-3 Control Panel Firmware with a CVSS 3.x base score of 7.5. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Swisslog-healthcare Hmi-3 Control Panel Firmware
Published: 2021-08-02
Last modified: 2026-06-17

Description

A buffer overflow issue leading to denial of service was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by released versions of software before Nexus Software 7.2.5.7. When HMI3 starts up, it binds a local service to a TCP port on all interfaces of the device, and takes extensive time for the GUI to connect to the TCP socket, allowing the connection to be hijacked by an external attacker.

Frequently asked questions

What is CVE-2021-37166?: A buffer overflow issue leading to denial of service was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by released versions of software before Nexus Software 7.2.5.7. When HMI3 starts up, it binds a local service to a TCP port on all interfaces of the device, and takes extensive time for the GUI to connect to the TCP socket, allowing the connection to be hijacked by an external attacker.
How severe is CVE-2021-37166?: CVE-2021-37166 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-37166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37166?: CVE-2021-37166 affects Swisslog-healthcare Hmi-3 Control Panel Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37166?: 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-2021-37166 published?: CVE-2021-37166 was published on 2021-08-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:swisslog-healthcare:hmi-3_control_panel_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Swisslog-healthcare Hmi-3 Control Panel Firmware

CVE-2021-37167 — Critical (CVSS 9.8): An insecure permissions issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by…
CVE-2021-37164 — Critical (CVSS 9.8): A buffer overflow issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by released…
CVE-2021-37163 — Critical (CVSS 9.8): An insecure permissions issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus operated by released…
CVE-2021-37162 — Critical (CVSS 9.8): A buffer overflow issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by released…
CVE-2021-37161 — Critical (CVSS 9.8): A buffer overflow issue was discovered in the HMI3 Control Panel contained within the Swisslog Healthcare Nexus Panel,…
CVE-2021-37160 — Critical (CVSS 9.8): A firmware validation issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus Panel operated by…

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