What is the CVSS score of CVE-2020-37159?

CVE-2020-37159 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: 0.1%.

Is there a public PoC exploit available for CVE-2020-37159?

Yes, a public proof-of-concept exploit is available for CVE-2020-37159. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2020-37159?

Within 24 hours: Inventory all systems running Parallaxis Cuckoo Clock 5.0 and isolate them from production networks if possible; disable the alarm scheduling feature if operationally feasible. Within 7 days: Implement network segmentation to restrict access to affected systems; deploy WAF rules to block exploitation attempts if accessible via web interface; monitor for suspicious alarm scheduling activity and memory access patterns. Within 30 days: Evaluate alternative scheduling solutions; contact vendor for patch timelines; conduct forensic analysis for signs of compromise; implement application whitelisting on affected servers.

CVE-2020-37159

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-02-07 disclosure@vulncheck.com

RCE Buffer Overflow

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

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 09, 2026 - 16:08 vuln.today

Public exploit code

CVE Published

Feb 07, 2026 - 00:15 nvd

CRITICAL 9.8

DescriptionCVE.org

Parallaxis Cuckoo Clock 5.0 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting memory registers in the alarm scheduling feature. Attackers can craft a malicious payload exceeding 260 bytes to overwrite EIP and EBP, enabling shellcode execution with potential remote code execution.

AnalysisAI

Parallaxis Cuckoo Clock 5.0 has a buffer overflow enabling code execution through crafted input.

Technical ContextAI

CWE-121 stack buffer overflow in Parallaxis Cuckoo Clock 5.0.

Affected ProductsAI

Parallaxis Cuckoo Clock 5.0

RemediationAI

Avoid using this software with untrusted files.

CVE-2020-37159 vulnerability details – vuln.today

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CVE-2020-37159

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code