CVE-2021-47877 GeoGebra Graphing Calculator 6.0.631.0 - Denial Of Service
Attackers can crash the GeoGebra Graphing Calculator by inputting an oversized buffer, causing the application to become unresponsive.
- 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-2021-47877?
CVE-2021-47877 is a medium-severity denial of service vulnerability in GeoGebra Graphing Calculator, published on 21 Jan 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
GeoGebra Graphing Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the application by inputting an oversized buffer. Attackers can generate a payload of 8000 repeated characters to overwhelm the input field and cause the application to become unresponsive.
Weakness: CWE-770
Which versions are affected by CVE-2021-47877?
How do I fix CVE-2021-47877?
No fix has been published for CVE-2021-47877 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47877 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47877 exists.
Sources
Also known as GHSA-4f8m-8mgg-8vf4.