Action not permitted
Modal body text goes here.
Modal Title
Modal Body
GHSA-RWM8-8C4X-V87Q
Vulnerability from github – Published: 2022-05-24 17:43 – Updated: 2025-10-22 00:32
VLAI
Details
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27078.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2021-27065"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-03T00:15:00Z",
"severity": "HIGH"
},
"details": "Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27078.",
"id": "GHSA-rwm8-8c4x-v87q",
"modified": "2025-10-22T00:32:04Z",
"published": "2022-05-24T17:43:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27065"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27065"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27065"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
CVE-2021-27065 (GCVE-0-2021-27065)
Vulnerability from cvelistv5 – Published: 2021-03-02 23:55 – Updated: 2026-08-19 16:30
VLAI
EPSS
VEX
Title
Microsoft Exchange Server Remote Code Execution Vulnerability
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
Severity
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2021-03-01 00:00 UTC
CWE
- Remote Code Execution
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISCx_transferred |
| http://packetstormsecurity.com/files/161938/Micro… | x_refsource_MISCx_transferred |
| http://packetstormsecurity.com/files/162736/Micro… | x_refsource_MISCx_transferred |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
25 products
Date Public
2021-03-02 16:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T20:40:47.231Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27065"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-27065",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2021-03-01T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27065"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-12T03:55:33.978Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27065"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2021-27065 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2013 Cumulative Update 21",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.00.1395.012",
"status": "affected",
"version": "15.00.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2013 Cumulative Update 22",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.00.1473.006",
"status": "affected",
"version": "15.00.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2013 Cumulative Update 23",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.00.1497.012",
"status": "affected",
"version": "15.00.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2013 Service Pack 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.00.0847.064",
"status": "affected",
"version": "15.00.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 10",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1531.012",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 11",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1591.018",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 12",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1713.010",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 13",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1779.008",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 14",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1847.012",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 15",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1913.012",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 16",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1979.008",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 17",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.2044.013",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 18",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.2106.013",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 19",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.2176.009",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1415.010",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2016 Cumulative Update 9",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1466.016",
"status": "affected",
"version": "15.01.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0221.018",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.01.1979.006",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0397.011",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 3",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0464.015",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 4",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0659.012",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 5",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0595.008",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 6",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0529.013",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 7",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0721.013",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Microsoft Exchange Server 2019 Cumulative Update 8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "15.02.0792.010",
"status": "affected",
"version": "15.02.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0221.018",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_22:*:*:*:*:*:*",
"versionEndExcluding": "15.00.1473.006",
"versionStartIncluding": "15.00.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_2:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0397.011",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_13:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1779.008",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_23:*:*:*:*:*:*",
"versionEndExcluding": "15.00.1497.012",
"versionStartIncluding": "15.00.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_3:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0464.015",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_14:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1847.012",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_4:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0659.012",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_15:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1913.012",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_5:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0595.008",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_6:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0529.013",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_16:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1979.008",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_17:*:*:*:*:*:*",
"versionEndExcluding": "15.01.2044.013",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_7:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0721.013",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_18:*:*:*:*:*:*",
"versionEndExcluding": "15.01.2106.013",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_19:*:*:*:*:*:*",
"versionEndExcluding": "15.01.2176.009",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_8:*:*:*:*:*:*",
"versionEndExcluding": "15.02.0792.010",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_1:*:*:*:*:*:*",
"versionEndExcluding": "15.00.0847.064",
"versionStartIncluding": "15.00.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_21:*:*:*:*:*:*",
"versionEndExcluding": "15.00.1395.012",
"versionStartIncluding": "15.00.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_12:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1713.010",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_8:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1415.010",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_1:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1979.006",
"versionStartIncluding": "15.02.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_9:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1466.016",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_10:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1531.012",
"versionStartIncluding": "15.01.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_11:*:*:*:*:*:*",
"versionEndExcluding": "15.01.1591.018",
"versionStartIncluding": "15.01.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"datePublic": "2021-03-02T16:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "Microsoft Exchange Server Remote Code Execution Vulnerability"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Remote Code Execution",
"lang": "en-US",
"type": "Impact"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:30:49.357Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"name": "Microsoft Exchange Server Remote Code Execution Vulnerability",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27065"
}
],
"title": "Microsoft Exchange Server Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2021-27065",
"datePublished": "2021-03-02T23:55:28.000Z",
"dateReserved": "2021-02-10T00:00:00.000Z",
"dateUpdated": "2026-08-19T16:30:49.357Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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…
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.
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.
Loading…
Loading…