Security readout for executives and security teams
Plain-English summary
CVE-2021-47791 affects SmartFTP Client 10.0.2909.0 and can crash the application through malformed input. The business impact is availability loss for users relying on SmartFTP transfers, not data theft based on the sources. Public exploit material is referenced, but no source provided indicates active exploitation.
Executive priority
Treat as a targeted availability risk, not a confirmed breach risk. Prioritize if SmartFTP is used for critical transfers or automated operational workflows. If usage is limited, handle through normal patch and software lifecycle processes.
Technical view
The issue is reported as multiple denial-of-service conditions in SmartFTP Client 10.0.2909.0, 32-bit and 64-bit. Inputs include malformed paths, invalid IP addresses, and clearing connection history. CVSS 3.1 is 7.5 with availability impact only. CWE-770 is listed. Source details are limited and do not name a vendor-fixed version.
Likely exposure
Exposure appears limited to environments running SmartFTP Client 10.0.2909.0. The affected component is an end-user client application, so business risk is concentrated where SmartFTP is operationally important for file transfers.
Exploitation context
Exploit-DB is listed as a public exploit reference, so proof-of-concept information is publicly available. The source bundle does not show CISA KEV listing or any cited evidence of active exploitation in the wild.
Researcher notes
The record has some ambiguity: CVSS indicates network, no user interaction, while the description references client interface actions. No vendor advisory or fixed version is provided in the supplied sources. Avoid assuming remote exploitability beyond the cited CVSS and advisory text.
Mitigation direction
- Inventory endpoints for SmartFTP Client 10.0.2909.0, both 32-bit and 64-bit.
- Check SmartFTP guidance and download pages for supported, newer versions.
- Prioritize replacement or upgrade where SmartFTP supports business-critical transfers.
- Restrict use of the vulnerable client until vendor guidance is confirmed.
- Monitor crash reports from systems running affected SmartFTP versions.
Validation and detection
- Confirm installed SmartFTP Client version on managed endpoints.
- Identify whether version 10.0.2909.0 is present.
- Review endpoint logs for repeated SmartFTP application crashes.
- Verify whether updated SmartFTP builds are approved and deployed.
- Document business workflows dependent on the affected client.
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-2021-47791 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50266CVE reference · exploit
- SmartFTP Official HomepageCVE reference · product
- SmartFTP Download PageCVE reference · product
- VulnCheck Advisory: SmartFTP Client 10.0.2909.0 - 'Multiple' Denial of ServiceCVE reference · third-party-advisory
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.