Security readout for executives and security teams
Plain-English summary
CVE-2021-47771 affects Cinspiration RDP Manager 4.9.9.3. A local user can enter oversized values into connection fields and cause the application to freeze or crash persistently. The business impact is disruption to users who depend on this tool for RDP connection management, not direct system takeover based on the provided sources.
Executive priority
Treat as a moderate-priority availability issue. Prioritize environments where many administrators rely on RDP Manager or where local user access is broad. It is less urgent than remotely exploitable code execution, but it can interrupt operations and require application recovery.
Technical view
The issue is a local denial-of-service in RDP Manager 4.9.9.3 connection input handling, specifically the Verbindungsname and Server fields. It is associated with CWE-770 and CVSS 4.0 score 6.8. The vector indicates local access, low complexity, low privileges, no user interaction, and high vulnerable-system availability impact.
Likely exposure
Exposure is limited to endpoints where Cinspiration RDP Manager 4.9.9.3 is installed and accessible to local users. Server-side or remote unauthenticated exposure is not supported by the provided sources.
Exploitation context
Public exploit-oriented references exist, including Exploit-DB and Vulnerability-Lab. However, the CVE is not marked KEV, and the provided sources do not state active exploitation in the wild. Exploitation requires local access and low privileges.
Researcher notes
The public descriptions focus on oversized connection field values causing persistent application freeze or crash. Evidence does not establish broader privilege impact, data compromise, or remote attack surface. No source in the bundle names a specific patch, so remediation should be tied to vendor-confirmed guidance.
Mitigation direction
- Inventory systems for Cinspiration RDP Manager version 4.9.9.3.
- Check Cinspiration or trusted vendor channels for updated guidance or replacement versions.
- Restrict local access to systems running the affected application.
- Remove the application where it is no longer required.
- Back up RDP Manager configuration data before remediation or reinstallation.
Validation and detection
- Confirm whether RDP Manager 4.9.9.3 is installed on managed endpoints.
- Review software inventory, endpoint management, and helpdesk records for affected installations.
- Verify whether local non-admin users can launch the application.
- Check vendor sources for any documented fixed release or advisory.
- Document remediation status for every identified installation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-770: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47771 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.8MediumVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50484CVE reference · exploit
- Archived Software Download PageCVE reference · product
- Vulnerability-Lab DisclosureCVE reference · technical-description, exploit
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.