HOMEVULNERABILITIESCVE-2021-32471
HIGH

CVE-2021-32471

CWE-20Published: May 10, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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."

NVD Source

Technical Analysis

CVE-2021-32471 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

mit1 product(s)
universal turing machine
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://arxiv.org/abs/2105.02124
ADVISORYhttps://github.com/intrinsic-propensity/turing-machine
ADVISORYhttps://arxiv.org/abs/2105.02124
ADVISORYhttps://github.com/intrinsic-propensity/turing-machine

All References (4)

→
https://arxiv.org/abs/2105.02124Third Party Advisory
→
https://github.com/intrinsic-propensity/turing-machineExploit · Third Party Advisory
→
https://arxiv.org/abs/2105.02124Third Party Advisory
→
https://github.com/intrinsic-propensity/turing-machineExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-32471
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedMay 10, 2021

Related CVEs (CWE-20)

CVE-2025-34105
10.0
CVE-2007-1097
10.0
CVE-2026-47928
10.0
CVE-2026-12537
10.0
CVE-2004-0840
10.0
CVE-2007-1257
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-32471 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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