Stack-based Buffer OverflowWeakness · CWE-121

CVE-2020-37184

CRITICAL · 9.8 CVSS v3.1 Published 2026-02-11
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Allok Video Converter 4.6.1217 contains a stack overflow vulnerability in the License Name input field that allows attackers to execute arbitrary code. Attackers can craft a specially designed payload to overwrite SEH handlers and execute system commands by injecting malicious bytecode into the input field.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Allok Video Converter 4.6.1217 has a stack-based buffer overflow in the License Name input field. Attackers can send an overly long string to overwrite SEH (Structured Exception Handler) handlers, enabling arbitrary code execution with the application's privileges.

MitigationSince this is a legacy desktop application likely without vendor support, the primary mitigation is to avoid entering untrusted data in the License Name field, or discontinue use of the software entirely until a vendor patch becomes available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Allok Video Converter is installed
    Search for the application executable in typical installation directories such as C:\Program Files\Allok Video Converter or C:\Program Files (x86)\Allok Video Converter, or search the Windows registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for an entry named 'Allok Video Converter'
    Affected if The application is found installed on the system
  2. Confirm installed version is 4.6.1217
    Right-click the Allok Video Converter executable (typically allok_video_converter.exe), select Properties, and check the File Version field on the Details tab, or launch the application and navigate to Help > About to view the version number
    Affected if The displayed version matches 4.6.1217 exactly
  3. Locate the License Name input functionality
    Launch the application and navigate to the licensing or registration screen, typically found under Help > Register, Options > License, or a similar menu entry. Identify the input field labeled 'License Name' or 'User Name' where license credentials are entered
    Affected if The License Name input field is present and accessible in the application interface
  4. Check if untrusted or external license data is being processed
    Review any configuration files, license files, or registry entries in the application data folder (commonly %APPDATA%\Allok Video Converter or %LOCALAPPDATA%\Allok Video Converter) for license-related entries, and check if the application is configured to auto-load license files from network locations or user-supplied paths
    Affected if The application processes license data from external or untrusted sources, or stores license information in accessible configuration files

The system is affected if Allok Video Converter version 4.6.1217 is installed and the License Name input field is accessible or used to process any license data.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since this is a legacy desktop application likely without vendor support, the primary mitigation is to avoid entering untrusted data in the License Name field, or discontinue use of the software entirely until a vendor patch becomes available.

Have this fixed Scoped from the published advisory
  • Consultation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-37184 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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