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CVE-2021-26857
HIGHCISA KEV7.8
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE Details
CVSS v3.1 Score7.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
Published3/3/2021
Last Modified12/18/2025
Sourcekev
Honeypot Sightings0
CISA KEV
VendorMicrosoft
ProductExchange Server
Vulnerability NameMicrosoft Exchange Server Remote Code Execution Vulnerability
KEV Date Added2021-11-03
Remediation Due Date2022-05-03
Ransomware UseKnown
Affected Products
microsoft:exchange_server
Weaknesses (CWE)
CWE-502CWE-502
References
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26857(secure@microsoft.com)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26857(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26857(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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