How severe is CVE-2021-32471?

CVE-2021-32471 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32471 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32471?

CVE-2021-32471 affects Mit Universal Turing Machine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32471?

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

When was CVE-2021-32471 published?

CVE-2021-32471 was published on 2021-05-10 and last updated on 2026-06-17.

CVE-2021-32471

CVE-2021-32471 is a high-severity vulnerability in Mit Universal Turing Machine with a CVSS 3.x base score of 7.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Mit Universal Turing Machine
Published: 2021-05-10
Last modified: 2026-06-17

Description

Insufficient input validation in the Marvin Minsky 1967 implementation of the Universal Turing Machine allows program users to execute arbitrary code via crafted data. For example, a tape head may have an unexpected location after the processing of input composed of As and Bs (instead of 0s and 1s). NOTE: the discoverer states "this vulnerability has no real-world implications."

Frequently asked questions

What is CVE-2021-32471?: Insufficient input validation in the Marvin Minsky 1967 implementation of the Universal Turing Machine allows program users to execute arbitrary code via crafted data. For example, a tape head may have an unexpected location after the processing of input composed of As and Bs (instead of 0s and 1s). NOTE: the discoverer states "this vulnerability has no real-world implications."
How severe is CVE-2021-32471?: CVE-2021-32471 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32471 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32471?: CVE-2021-32471 affects Mit Universal Turing Machine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32471?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32471 published?: CVE-2021-32471 was published on 2021-05-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mit:universal_turing_machine:-:*:*:*:*:*:*:*

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