CVE-2021-26427

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS v3.0 9.6 CRITICAL
CVSS v2.0 5.8 MEDIUM

9.6^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

5.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:A/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 6.5 / Impact : 6.4

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26427	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23::::::
	cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21::::::
	cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22::::::
	cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10::::::
	cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11::::::

Information

Published : 2021-10-12 18:15

Updated : 2021-10-19 16:09

NVD link : CVE-2021-26427

Mitre link : CVE-2021-26427

JSON object : View

CWE

NVD-CWE-noinfo

Products Affected

microsoft

exchange_server

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26427", "name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26427", "tags": ["Patch", "Vendor Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Microsoft Exchange Server Remote Code Execution Vulnerability"}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-26427", "ASSIGNER": "secure@microsoft.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 5.8, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 6.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.6, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.8}}, "publishedDate": "2021-10-13T01:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-10-19T23:09Z"}

9.6 /10