CVE-2021-47875
CWE-770Published: January 21, 2026· Updated: Jun 17, 2026
Official Description
GeoGebra CAS Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the application by generating a large buffer overflow. Attackers can create a payload with 8000 repeated characters and paste it into the calculator's input field to trigger an application crash.
Risk Analysis
GeoGebra CAS Calculator is susceptible to a denial of service attack via a large buffer overflow. An attacker can crash the application by inputting a specifically crafted, long string. The 9.8 CVSS score reflects the ease of causing a service disruption.
No public exploit is known, and it is not in the KEV database. The vulnerability is remotely exploitable.
Apply available security patches or updates for the GeoGebra CAS Calculator.
Technical Analysis
CVE-2021-47875 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (3)
Quick Facts
Related CVEs (CWE-770)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-47875 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts