Buffer Overflow Vulnerability in Cmder Console Emulator by CmderDev
CVE-2021-47781

6.7MEDIUM

Key Information:

Vendor

Cmder

Status
Cmder Console Emulator
Vendor
CVE Published:
15 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47781?

The Cmder Console Emulator version 1.3.18 is susceptible to a buffer overflow vulnerability that enables attackers to induce a denial of service condition. This is achieved by crafting a malicious .cmd file containing a sequence of repeated characters, strategically designed to exceed the buffer limits of the console emulator. When the vulnerable application processes such a file, it may crash, disrupting service and potentially opening the door for further exploitation.

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Affected Version(s)

Cmder Console Emulator 1.3.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47781 - Proof of Concept

References

https://www.exploit-db.com/exploits/50401
exploit
https://github.com/cmderdev/cmder
product

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Aryan Chehreghani
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