Denial of Service Vulnerability in GeoGebra CAS Calculator by GeoGebra
CVE-2021-47875

4.6MEDIUM

Key Information:

Vendor

Geogebra

Status
Cas Calculator
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47875?

GeoGebra CAS Calculator version 6.0.631.0 is vulnerable to a denial of service due to an improper handling of input, which allows attackers to craft a payload consisting of 8000 repeated characters. When this payload is inputted into the calculator, it triggers a buffer overflow that leads to an application crash, effectively rendering the software unusable until restarted.

Affected Version(s)

CAS Calculator 6.0.631.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47875 - Proof of Concept

References

https://www.exploit-db.com/exploits/49655
exploit
https://www.geogebra.org
product
https://www.vulncheck.com/advisories/geogebra-cas-calcula...
third-party-advisory

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Brian Rodriguez
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