CVE-2020-37159 Cuckoo Clock 5.0 - Buffer Overflow
Attackers can execute arbitrary code via a buffer overflow in the alarm scheduling feature of Cuckoo Clock software. Users of this desktop application should be aware of the risk.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-37159?
CVE-2020-37159 is a high-severity memory corruption vulnerability in Parallaxis Cuckoo Clock, published on 6 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-121
Which versions are affected by CVE-2020-37159?
How do I fix CVE-2020-37159?
No fix has been published for CVE-2020-37159 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-37159 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37159 exists.
Sources
Also known as GHSA-g382-2692-6x82.