CVE-2020-37159

CRITICAL

Parallaxis Cuckoo Clock 5.0 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37159. PoCs published by boku.

AI-analyzed exploit summary This exploit demonstrates a buffer overflow vulnerability in Cuckoo Clock 5.0, leveraging a JMP ESP instruction to execute shellcode that spawns a calculator. The payload is crafted to overwrite EIP and ESP, with bad characters avoided.

Description

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.

Exploits (1)

exploitdb WORKING POC
by boku · pythonlocalwindows
https://www.exploit-db.com/exploits/48087

This exploit demonstrates a buffer overflow vulnerability in Cuckoo Clock 5.0, leveraging a JMP ESP instruction to execute shellcode that spawns a calculator. The payload is crafted to overwrite EIP and ESP, with bad characters avoided.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Parallaxis Cuckoo Clock 5.0
No auth needed
Prerequisites: Cuckoo Clock 5.0 installed on Windows 10 (32-bit) · Ability to paste payload into the 'New Alarm' textbox
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/48087
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/cuckoo-clock-buffer-overflow

Scores

CVSS v3 9.8
EPSS 0.0062
EPSS Percentile 44.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
Parallaxis/Cuckoo Clock 5.0
Published Feb 07, 2026
Tracked Since Feb 18, 2026