CVE-2021-26855
CVSS V2 High 7.5
CVSS V3 Critical 9.8
Description
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, CVE-2021-27078.
Overview
- CVE ID
- CVE-2021-26855
- Assigner
- secure@microsoft.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-03T00:15:12
- Last Modified Date
- 2022-07-12T17:42:04
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_22:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 7.5
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855 | Patch Vendor Advisory |
| http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html | Exploit Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html | Exploit Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html | Exploit Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html | Exploit Third Party Advisory VDB Entry |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-26855 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26855 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-08 06:06:53 | Added to TrackCVE | |||
| 2022-12-05 23:01:11 | 2021-03-03T00:15Z | 2021-03-03T00:15:12 | CVE Published Date | updated |
| 2022-12-05 23:01:11 | 2022-07-12T17:42:04 | CVE Modified Date | updated | |
| 2022-12-05 23:01:11 | Analyzed | Vulnerability Status | updated |