CVE-2021-47771

Name: CVE-2021-47771
Creator: NVD / NIST
Published: 2026-01-15T16:16:08.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2021-47771 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

6.8/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.22%

12.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Cinspiration	Rdp Manager	4.9.9.3

References

https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.htmlProduct, Release Notes
https://www.exploit-db.com/exploits/50484Exploit, Third Party Advisory
https://www.vulnerability-lab.com/get_content.php?id=2309Third Party Advisory
https://www.exploit-db.com/exploits/50484Exploit, Third Party Advisory
https://www.vulnerability-lab.com/get_content.php?id=2309Third Party Advisory

Timeline

Published: Jan 15, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-47771?

How severe is CVE-2021-47771?

CVE-2021-47771 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST