CVE-2021-47771 RDP Manager 4.9.9.3 - Denial-of-Service (PoC)
Local attackers can crash RDP Manager by inputting oversized data into connection fields, causing a permanent freeze that requires reinstallation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47771?
CVE-2021-47771 is a medium-severity denial of service vulnerability in Cinspiration RDP Manager, published on 15 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
RDP Manager 4.9.9.3 contains a denial of service vulnerability in connection input fields that allows local attackers to crash the application. Attackers can add oversized entries in Verbindungsname and Server fields to permanently freeze and crash the software, potentially requiring full reinstallation.
Weakness: CWE-770
Which versions are affected by CVE-2021-47771?
It affects 1 product.
Products include Cinspiration Rdp Manager.
How do I fix CVE-2021-47771?
No fix has been published for CVE-2021-47771 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-2021-47771 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47771 exists.
Sources
Also known as GHSA-9mq4-vwgf-j98g.