CVE-2021-47771
RDP Manager 4.9.9.3 - Denial-of-Service (PoC)
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.
INFO
Published Date :
Jan. 15, 2026, 4:16 p.m.
Last Modified :
Jan. 26, 2026, 4:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update RDP Manager to a version that addresses the vulnerability.
- Avoid entering oversized data into connection fields.
- Validate all user inputs for length constraints.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47771.
| URL | Resource |
|---|---|
| https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html | Product Release Notes |
| https://www.exploit-db.com/exploits/50484 | Exploit Third Party Advisory |
| https://www.vulnerability-lab.com/get_content.php?id=2309 | Third Party Advisory |
| https://www.exploit-db.com/exploits/50484 | Exploit Third Party Advisory |
| https://www.vulnerability-lab.com/get_content.php?id=2309 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47771 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47771
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47771 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47771 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jan. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Removed CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
Initial Analysis by [email protected]
Jan. 23, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:cinspiration:rdp_manager:4.9.9.3:*:*:*:*:*:*:* Added Reference Type VulnCheck: https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html Types: Product, Release Notes Added Reference Type CISA-ADP: https://www.exploit-db.com/exploits/50484 Types: Exploit, Third Party Advisory Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/50484 Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://www.vulnerability-lab.com/get_content.php?id=2309 Types: Third Party Advisory Added Reference Type VulnCheck: https://www.vulnerability-lab.com/get_content.php?id=2309 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 15, 2026
Action Type Old Value New Value Added Reference https://www.exploit-db.com/exploits/50484 Added Reference https://www.vulnerability-lab.com/get_content.php?id=2309 -
New CVE Received by [email protected]
Jan. 15, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html Added Reference https://www.exploit-db.com/exploits/50484 Added Reference https://www.vulnerability-lab.com/get_content.php?id=2309