CVE-2021-47781
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-15

Last updated on: 2026-01-15

Assigner: VulnCheck

Description
Cmder Console Emulator 1.3.18 contains a buffer overflow vulnerability that allows attackers to trigger a denial of service condition through a maliciously crafted .cmd file. Attackers can create a specially constructed .cmd file with repeated characters to overwhelm the console emulator's buffer and crash the application.
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Meta Information
Published
2026-01-15
Last Modified
2026-01-15
Generated
2026-06-16
AI Q&A
2026-01-16
EPSS Evaluated
2026-06-15
NVD
CVE-2021-47781
EUVD
EUVD-2026-2757
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cmderdev cmder 1.3.18
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is a buffer overflow in Cmder Console Emulator version 1.3.18. It occurs when a specially crafted .cmd file containing repeated characters is executed, which overwhelms the console emulator's buffer and causes the application to crash or become unresponsive, resulting in a denial of service condition. [2]

Impact Analysis

The vulnerability can impact you by causing a denial of service (DoS) on the Cmder Console Emulator. If a maliciously crafted .cmd file is executed locally, it can crash or freeze the application, disrupting your ability to use the console emulator until it is restarted. [2]

Detection Guidance

This vulnerability can be detected by attempting to execute a specially crafted .cmd file that contains a repeated payload designed to overflow Cmder's buffer. For example, creating a .cmd file with a payload consisting of the byte chr(235) concatenated with the string "\\CMDER", repeated 3000 times, and then running this file within Cmder will trigger the buffer overflow and cause the application to crash or become unresponsive. This method acts as a proof-of-concept to detect the vulnerability locally. [2]

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