CVE-2021-47818 DupTerminator 1.4.5639.37199 - Denial of Service
Attackers can crash the DupTerminator desktop application by inputting a long character string into the Excluded text box.
- 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-2021-47818?
CVE-2021-47818 is a medium-severity denial of service vulnerability in DupTerminator, published on 16 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
DupTerminator 1.4.5639.37199 contains a denial of service vulnerability that allows attackers to crash the application by inputting a long character string in the Excluded text box. Attackers can generate a payload of 8000 repeated characters to trigger the application to stop working on Windows 10.
Weakness: CWE-1284
Which versions are affected by CVE-2021-47818?
How do I fix CVE-2021-47818?
No fix has been published for CVE-2021-47818 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47818 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47818 exists.
Sources
Also known as GHSA-2cx4-58j3-2jr5.