CVE-2021-47771 (GCVE-0-2021-47771)
Vulnerability from cvelistv5 – Published: 2026-01-15 15:52 – Updated: 2026-01-26 15:55
VLAI
Title
RDP Manager 4.9.9.3 - Denial-of-Service (PoC)
Summary
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.
Severity
5.5 (Medium)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/50484 | exploit |
| https://web.archive.org/web/20210613025240/https:… | product |
| https://www.vulnerability-lab.com/get_content.php… | technical-descriptionexploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cinspiration | RDP Manager |
Affected:
4.9.9.3
|
Date Public
2021-10-18 00:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-47771",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-15T16:12:46.799039Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-15T18:26:51.398Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://www.exploit-db.com/exploits/50484"
},
{
"tags": [
"exploit"
],
"url": "https://www.vulnerability-lab.com/get_content.php?id=2309"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "RDP Manager",
"vendor": "Cinspiration",
"versions": [
{
"status": "affected",
"version": "4.9.9.3"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Vulnerability-Lab"
}
],
"datePublic": "2021-10-18T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-26T15:55:03.546Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "ExploitDB-50484",
"tags": [
"exploit"
],
"url": "https://www.exploit-db.com/exploits/50484"
},
{
"name": "Archived Software Download Page",
"tags": [
"product"
],
"url": "https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html"
},
{
"name": "Vulnerability-Lab Disclosure",
"tags": [
"technical-description",
"exploit"
],
"url": "https://www.vulnerability-lab.com/get_content.php?id=2309"
}
],
"title": "RDP Manager 4.9.9.3 - Denial-of-Service (PoC)",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2021-47771",
"datePublished": "2026-01-15T15:52:11.366Z",
"dateReserved": "2026-01-14T14:39:44.736Z",
"dateUpdated": "2026-01-26T15:55:03.546Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-47771",
"date": "2026-05-26",
"epss": "0.00011",
"percentile": "0.01446"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-47771\",\"sourceIdentifier\":\"disclosure@vulncheck.com\",\"published\":\"2026-01-15T16:16:08.670\",\"lastModified\":\"2026-01-26T16:15:55.927\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"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/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\",\"baseScore\":6.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cinspiration:rdp_manager:4.9.9.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"088281AA-28DA-4880-89C7-50827908FC20\"}]}]}],\"references\":[{\"url\":\"https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Product\",\"Release Notes\"]},{\"url\":\"https://www.exploit-db.com/exploits/50484\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.vulnerability-lab.com/get_content.php?id=2309\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.exploit-db.com/exploits/50484\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.vulnerability-lab.com/get_content.php?id=2309\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Third Party Advisory\"]}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47771\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-15T16:12:46.799039Z\"}}}], \"references\": [{\"url\": \"https://www.exploit-db.com/exploits/50484\", \"tags\": [\"exploit\"]}, {\"url\": \"https://www.vulnerability-lab.com/get_content.php?id=2309\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-15T16:12:50.068Z\"}}], \"cna\": {\"title\": \"RDP Manager 4.9.9.3 - Denial-of-Service (PoC)\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Vulnerability-Lab\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 6.8, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"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\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cinspiration\", \"product\": \"RDP Manager\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.9.9.3\"}]}], \"datePublic\": \"2021-10-18T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.exploit-db.com/exploits/50484\", \"name\": \"ExploitDB-50484\", \"tags\": [\"exploit\"]}, {\"url\": \"https://web.archive.org/web/20210613025240/https://www.cinspiration.de/download.html\", \"name\": \"Archived Software Download Page\", \"tags\": [\"product\"]}, {\"url\": \"https://www.vulnerability-lab.com/get_content.php?id=2309\", \"name\": \"Vulnerability-Lab Disclosure\", \"tags\": [\"technical-description\", \"exploit\"]}], \"x_generator\": {\"engine\": \"vulncheck\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-01-26T15:55:03.546Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-47771\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-26T15:55:03.546Z\", \"dateReserved\": \"2026-01-14T14:39:44.736Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-01-15T15:52:11.366Z\", \"assignerShortName\": \"VulnCheck\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…