Stack-based Buffer OverflowWeakness · CWE-121

CVE-2020-37183

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 RM RMVB to AVI MPEG DVD Converter 3.6.1217 contains a stack overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) registers. Attackers can craft a malicious payload in the License Name input field to trigger a buffer overflow and execute system commands like calc.exe.

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 · moderate confidence

A stack buffer overflow exists in Allok RM RMVB to AVI MPEG DVD Converter 3.6.1217 within the License Name input field. By supplying an overly long string, attackers can overwrite Structured Exception Handler (SEH) records on the stack and achieve arbitrary code execution, as demonstrated by launching calc.exe.

MitigationIf a patched version exists, upgrade immediately. Otherwise, restrict network access to this software, implement application sandboxing, and consider input validation through external mechanisms if the application cannot be updated.

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. Locate the Allok RM RMVB to AVI MPEG DVD Converter installation
    Search for the software in standard installation directories (typically C:\Program Files\Allok or C:\Program Files (x86)\Allok) or check the Windows Add/Remove Programs list
    Affected if The software is found on the system
  2. Identify the installed version number
    Right-click the executable (usually named Allok RM RMVB to AVI MPEG DVD Converter.exe), select Properties, and check the Details tab for the File Version
    Affected if The version is 3.6.1217 exactly, or falls within the 3.6.x family without a later patch
  3. Verify the License Name input field exists
    Launch the application and navigate to the License/Registration area where users enter their license name
    Affected if The application has a License Name input field and accepts user-supplied text (default behavior)
  4. Check for signs of prior exploitation
    Review application logs, crash dumps, or antivirus/EDR alerts related to this application for signs of stack overflow or SEH overwrite attempts
    Affected if Any suspicious activity or crash reports associated with this software are found

If Allok RM RMVB to AVI MPEG DVD Converter version 3.6.1217 is installed and has the License Name input field available, the environment is affected by this CVE.

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

If a patched version exists, upgrade immediately. Otherwise, restrict network access to this software, implement application sandboxing, and consider input validation through external mechanisms if the application cannot be updated.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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Scan for this in your stack

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dbcve dependency scanner

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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-2020-37183 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
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