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.

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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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