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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-15

Last Modified

2026-01-15

Generated

2026-07-06

AI Q&A

2026-01-16

EPSS Evaluated

2026-07-05

NVD

CVE-2021-47781

EUVD

EUVD-2026-2757

Affected Vendors & Products

Vendor	Product	Version / Range
cmderdev	cmder	1.3.18

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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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