CVE Details for CVE: CVE-2021-26857
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26855, CVE-2021-26858, CVE-2021-27065, CVE-2021-27078.
Timestamps
Last major update 12-07-2022 - 17:42
Published 03-03-2021 - 00:15
Last modified 12-07-2022 - 17:42
Vulnerable Configurations
  • cpe:2.3:a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
    cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
CAPEC
Click the CAPEC title to display a description
  • An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.
CWE
CVSS
Base
6.8
Impact
6.4
Exploitability
8.6
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
CVSS3
Base
7.8
Impact
5.9
Exploitability
1.8
Access
Attack ComplexityAttack vectorPrivileges RequiredScopeUser Interaction
LOW LOCAL NONE UNCHANGED REQUIRED
Impact
ConfidentialityIntegrityAvailability
HIGH HIGH HIGH
VIA4 references
cvss-vector via4
AV:N/AC:M/Au:N/C:P/I:P/A:P
cvss3-vector via4
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H