Vulnerability · Published Feb 6, 2026 · Assigned by VulnCheck
CVE-2020-37159Cuckoo Clock 5.0 - Buffer Overflow
Critical 9.8
In plain English
A critical-severity stack buffer overflow in Cuckoo Clock from Parallaxis. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 47.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Parallaxis | Cuckoo Clock | 5.0 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-48087 exploit
- Vendor Homepage product
- VulnCheck Advisory: Cuckoo Clock 5.0 - Buffer Overflow third-party-advisory