CVE-2021-20021
Scores
EPSS
Percentile: 91.7%
CVSS
CVSS Score: 9.8/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Partial
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
Description
A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host.
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Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2021-20021
Source: cisa
URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Vulnerable Software (11)
Type: Configuration
Vendor: *
Product: email_security
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6103", "vulnerable...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6103", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_3300_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_3300:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_4300_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_4300:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_5000_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_5000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_5000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_5000:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_5050_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_5050_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_5050_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_5050:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_7000_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_7000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_7000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_7000:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_7050_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_7050_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_7050_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_7050:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_8300_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_8300:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_appliance_9000_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:sonicwall:email_security_appliance_9000:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: email_security_virtual_appliance
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true }, { ...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6103", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: hosted_email_security
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true }, { ...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6105", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.9.6103", "vulnerable": true } ], "operator": "OR"}
Source: nvd