What is the CVSS score of CVE-2021-40521?

CVE-2021-40521 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 4.3%.

Is there a public PoC exploit available for CVE-2021-40521?

Yes, a public proof-of-concept exploit is available for CVE-2021-40521. Prioritise patching immediately. EPSS: 4.3%.

Hsmx App 25 Firmware CVE-2021-40521

CRITICAL

2021-11-10 cve@mitre.org

RCE Hsmx App 25 Firmware Hsmx App 100 Firmware Hsmx App 1000 Firmware Hsmx App 5000 Firmware Hsmx App 20000 Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 10, 2021 - 16:15 nvd

CRITICAL 9.8

DescriptionNVD

Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.

AnalysisAI

Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution. Affected products include: Airangel Hsmx-App-25 Firmware, Airangel Hsmx-App-100 Firmware, Airangel Hsmx-App-1000 Firmware, Airangel Hsmx-App-5000 Firmware, Airangel Hsmx-App-20000 Firmware. Version information: through 5.2.04.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.