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CVE-2023-21529

HIGHCISA KEV
8.8

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

CVE Details

CVSS v3.1 Score8.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published2/14/2023
Last Modified4/14/2026
Sourcenvd
Honeypot Sightings0

CISA KEV

VendorMicrosoft
ProductExchange Server
Vulnerability NameMicrosoft Exchange Server Deserialization of Untrusted Data Vulnerability
KEV Date Added2026-04-13
Remediation Due Date2026-04-27
Ransomware UseKnown

Affected Products

microsoft:exchange_server

Weaknesses (CWE)

CWE-502

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529(secure@microsoft.com)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529(134c704f-9b21-4f2e-91b3-4a467353bcc0)
https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.