CVE-2021-47791

SmartFTP Client 10.0.2909.0 contains multiple denial of service vulnerabilities that allow attackers to crash the application through specific input manipulation. Attackers can trigger crashes by entering malformed paths, using invalid IP addresses, or clearing connection history in the client's interface.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.exploit-db.com/exploits/50266	Exploit
https://www.smartftp.com/en-us/	Product
https://www.smartftp.com/en-us/download	Product
https://www.vulncheck.com/advisories/smartftp-client-multiple-denial-of-service	Third Party Advisory
https://www.exploit-db.com/exploits/50266	Exploit

Configurations

Configuration 1 (hide)

cpe:2.3:a:smartftp:smartftp:10.0.2909.0:*:*:*:*:*:*:*

History

30 Jan 2026, 00:59

Type	Values Removed	Values Added
First Time		Smartftp Smartftp smartftp
CPE		cpe:2.3:a:smartftp:smartftp:10.0.2909.0:::::::*
References	~~() https://www.exploit-db.com/exploits/50266 -~~	() https://www.exploit-db.com/exploits/50266 - Exploit
References	~~() https://www.smartftp.com/en-us/ -~~	() https://www.smartftp.com/en-us/ - Product
References	~~() https://www.smartftp.com/en-us/download -~~	() https://www.smartftp.com/en-us/download - Product
References	~~() https://www.vulncheck.com/advisories/smartftp-client-multiple-denial-of-service -~~	() https://www.vulncheck.com/advisories/smartftp-client-multiple-denial-of-service - Third Party Advisory

16 Jan 2026, 22:16

Type	Values Removed	Values Added
References	~~() https://www.exploit-db.com/exploits/50266 -~~	() https://www.exploit-db.com/exploits/50266 -

16 Jan 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-16 00:16

Updated : 2026-01-30 00:59

NVD link : CVE-2021-47791

Mitre link : CVE-2021-47791

CVE.ORG link : CVE-2021-47791

JSON object : View

Products Affected

smartftp

smartftp

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2021-47791", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 4.6, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-01-16T00:16:22.827", "references": [{"url": "https://www.exploit-db.com/exploits/50266", "tags": ["Exploit"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.smartftp.com/en-us/", "tags": ["Product"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.smartftp.com/en-us/download", "tags": ["Product"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/smartftp-client-multiple-denial-of-service", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.exploit-db.com/exploits/50266", "tags": ["Exploit"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "SmartFTP Client 10.0.2909.0 contains multiple denial of service vulnerabilities that allow attackers to crash the application through specific input manipulation. Attackers can trigger crashes by entering malformed paths, using invalid IP addresses, or clearing connection history in the client's interface."}], "lastModified": "2026-01-30T00:59:00.067", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:smartftp:smartftp:10.0.2909.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07843FD2-CFDD-4E7D-A348-5E1A8CE1FBD3"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}