CVE-2021-47771

MEDIUM

RDP Manager 4.9.9.3 - Denial of Service via Oversized Connection Input Fields

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47771. PoCs published by Vulnerability-Lab.

AI-analyzed exploit summary This is a writeup detailing a local denial-of-service vulnerability in RDP Manager 4.9.9.3. The vulnerability is triggered by inputting a large number of characters into the 'Verbindungsname' and 'Server' fields, causing the application to crash permanently.

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.

Exploits (1)

exploitdb WRITEUP
by Vulnerability-Lab · textlocalwindows
https://www.exploit-db.com/exploits/50484

This is a writeup detailing a local denial-of-service vulnerability in RDP Manager 4.9.9.3. The vulnerability is triggered by inputting a large number of characters into the 'Verbindungsname' and 'Server' fields, causing the application to crash permanently.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: RDP Manager v4.9.9.3
Auth required
Prerequisites: Local access to the system · User privileges to modify RDP Manager entries
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50484
Third Party Advisory technical-description exploit
https://www.vulnerability-lab.com/get_content.php?id=2309

Scores

CVSS v3 5.5
EPSS 0.0022
EPSS Percentile 12.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
cinspiration/rdp_manager 4.9.9.3
Published Jan 15, 2026
Tracked Since Feb 18, 2026