CVE-2021-47781 Cmder Console Emulator 1.3.18 - 'Cmder.exe' Denial of Service (PoC)
Attackers can crash Cmder Console Emulator by providing a maliciously crafted .cmd file, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47781?
CVE-2021-47781 is a medium-severity memory corruption vulnerability in Cmder Console Emulator, published on 15 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2021-47781?
How do I fix CVE-2021-47781?
No fix has been published for CVE-2021-47781 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-47781 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47781 exists.
Sources
Also known as GHSA-7wmq-973g-rwg4.