How severe is CVE-2021-47875?

CVE-2021-47875 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-47875 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47875?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2021-47875 have an EU (EUVD) identifier?

Yes. CVE-2021-47875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3615.

When was CVE-2021-47875 published?

CVE-2021-47875 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2021-47875

CVE-2021-47875 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 4.6
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3615
Weakness: CWE-770
Published: 2026-01-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-47875?: 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.
How severe is CVE-2021-47875?: CVE-2021-47875 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-47875 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-47875?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2021-47875 have an EU (EUVD) identifier?: Yes. CVE-2021-47875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3615.
When was CVE-2021-47875 published?: CVE-2021-47875 was published on 2026-01-21 and last updated on 2026-06-17.

References

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities

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CVE-2024-44241 — Critical (CVSS 9.8): The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.1 and iPadOS 18.1, macOS Sequoia…
CVE-2022-3439 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.
CVE-2022-3456 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.

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