What is CVE-2021-47877?

CVE-2021-47877 is a high-severity vulnerability in Geogebra Graphing Calculato‪r‬, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-21.

How severe is CVE-2021-47877?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Geogebra Graphing Calculato‪r‬

CVE-2021-47877

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.

Published 2026-01-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Geogebra Graphing Calculato‪r‬ — versions 6.0.631.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

www.exploit-db.com/exploits/49653 (exploit)
www.geogebra.org (product)
www.vulncheck.com/advisories/geogebra-graphing-calculator-denial-of-service (third-party-advisory)

Frequently asked questions

What is CVE-2021-47877?: CVE-2021-47877 is a high-severity vulnerability in Geogebra Graphing Calculato‪r‬, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-21.
How severe is CVE-2021-47877?: High severity. CVSS v3 base score is 7.5 out of 10.