FKIE_CVE-2021-22894
Vulnerability from fkie_nvd - Published: 2021-05-27 12:15 - Updated: 2026-06-17 03:37
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/
Summary
A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.
References
Impacted products
{
"affected": [
{
"affectedData": [
{
"product": "Pulse Connect Secure",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fixed version 9.1R11.4"
}
]
}
],
"source": "support@hackerone.com"
}
],
"cisaActionDue": "2022-05-03",
"cisaExploitAdd": "2021-11-03",
"cisaRequiredAction": "Apply updates per vendor instructions.",
"cisaVulnerabilityName": "Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability",
"configurations": [
{
"nodes": [
{
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"matchCriteriaId": "3818B543-3415-4E27-8DAD-6BA9D3D9A1A5",
"vulnerable": true
},
{
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"matchCriteriaId": "D47D09A8-4AC4-4CD9-B648-5F26453E2E1D",
"vulnerable": true
},
{
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"matchCriteriaId": "2E65C588-32E5-42FB-B1C0-DE80C44A9E2E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.0:r2:*:*:*:*:*:*",
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{
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"matchCriteriaId": "5F87B761-02B2-4CF1-B7FE-21F92C772FF1",
"vulnerable": true
},
{
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"vulnerable": true
},
{
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"matchCriteriaId": "52851AAA-88FB-40BC-B41A-B821F6BA9F79",
"vulnerable": true
},
{
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"matchCriteriaId": "105B8B46-A328-4163-82FF-F4236FCA9B2D",
"vulnerable": true
},
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"vulnerable": true
},
{
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},
{
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"matchCriteriaId": "59F4A6F7-A6D4-4517-A316-7C7C002A9ED3",
"vulnerable": true
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{
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"vulnerable": true
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{
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"vulnerable": true
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{
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"matchCriteriaId": "E49FF0C8-CF7B-43D2-A144-5ED73848D875",
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"vulnerable": true
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{
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"vulnerable": true
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{
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"vulnerable": true
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{
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"matchCriteriaId": "4F450898-0B06-4073-9B76-BF22F68BD14F",
"vulnerable": true
},
{
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"matchCriteriaId": "4B21C181-DC49-4EBD-9932-DBB337151FF7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r10.0:*:*:*:*:*:*",
"matchCriteriaId": "5AA4B39F-2FB9-4752-B1F1-18812B0990B4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r10.2:*:*:*:*:*:*",
"matchCriteriaId": "232BAB6C-D318-4F80-8F49-4E700C21F535",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r11.0:*:*:*:*:*:*",
"matchCriteriaId": "ABD840BF-944E-4F4C-96DC-0256286338F6",
"vulnerable": true
},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r11.3:*:*:*:*:*:*",
"matchCriteriaId": "366EF5B8-0233-49B8-806A-E54F60410ADE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r2:*:*:*:*:*:*",
"matchCriteriaId": "4FEFC4B1-7350-46F9-80C1-42F5AE06142F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r3:*:*:*:*:*:*",
"matchCriteriaId": "DB7A6D62-6576-4713-9BF4-11068A72E8B7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r4:*:*:*:*:*:*",
"matchCriteriaId": "843BC1B9-50CC-4F8F-A454-A0CEC6E92290",
"vulnerable": true
},
{
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"matchCriteriaId": "D5355372-03EA-46D7-9104-A2785C29B664",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r4.2:*:*:*:*:*:*",
"matchCriteriaId": "3DE32A0C-8944-4F51-A286-266055CA4B2F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r4.3:*:*:*:*:*:*",
"matchCriteriaId": "0349A0CC-A372-4E51-899E-D7BA67876F4B",
"vulnerable": true
},
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"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r5:*:*:*:*:*:*",
"matchCriteriaId": "93D1A098-BD77-4A7B-9070-A764FB435981",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r6:*:*:*:*:*:*",
"matchCriteriaId": "3CCC2D7B-F835-45EC-A316-2F0C5F2CF565",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r7:*:*:*:*:*:*",
"matchCriteriaId": "AD812596-C77C-4129-982F-C22A25B52126",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r8:*:*:*:*:*:*",
"matchCriteriaId": "9FA0B20D-3FA1-42AE-BDC5-93D8A182927C",
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},
{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r8.1:*:*:*:*:*:*",
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{
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{
"criteria": "cpe:2.3:a:ivanti:connect_secure:9.1:r8.4:*:*:*:*:*:*",
"matchCriteriaId": "07AB853D-5A3F-4142-8417-1C9FB729A89E",
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{
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{
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],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room."
},
{
"lang": "es",
"value": "Se presenta una vulnerabilidad de Desbordamiento del B\u00fafer en Pulse Connect Secure versiones anteriores a 9.1R11.4, permite a un atacante autenticado remoto ejecutar c\u00f3digo arbitrario como usuario root por medio de una sala de reuniones dise\u00f1ada con fines maliciosos"
}
],
"id": "CVE-2021-22894",
"lastModified": "2026-06-17T03:37:58.127",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "COMPLETE",
"baseScore": 9.0,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 8.0,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-22894",
"options": [
{
"exploitation": "active"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T15:38:41.888319Z",
"version": "2.0.3"
}
}
]
},
"published": "2021-05-27T12:15:07.923",
"references": [
{
"source": "support@hackerone.com",
"tags": [
"Broken Link",
"Vendor Advisory"
],
"url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Vendor Advisory"
],
"url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22894"
}
],
"sourceIdentifier": "support@hackerone.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-94"
}
],
"source": "support@hackerone.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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