HIGHVulnerability
Verified
Global

CISA KEV: Microsoft Exchange Server — Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability

·Source: CISA KEV

Updated:

Executive Summary

Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.

Analysis

Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution. Added to CISA Known Exploited Vulnerabilities catalog on 2026-04-13. Remediation due: 2026-04-27.

Indicators of Compromise (1)

CVE (1)
CVE-2023-21529
NVDMITRE CVE
Source Attribution

Originally published by CISA KEV on Apr 13, 2026. Verified by: CISA.

Related Threats

LOWVulnerability

Weekly Metasploit Update: New Kerberos/Certificate tracing options, and multiple new modules

New Tracing Options As hard as we try to ensure that Metasploit is bug free, issues inevitably come up. Whether you’re running a module on an op or writing a new one, what we can do is make the debugging experience easier. To that end one of our two Google Summer of Code (GSoC) projects is here to deliver. Building on the previous pattern of HttpTrace comes two new options KerberosTicketTrace and

Rapid7
MEDIUMVulnerability

Ozempic Drug Maker Loses Clinical Trial Data in Hack

<img src="https://ismg-cdn.nyc3.cdn.digitaloceanspaces.com/articles/ozempic-drug-maker-loses-clinical-trial-data-in-hack-image_small-6-a-31962.jpg" align=right hspace=4><b>Novo Nordisk Breach Involved 'Copying' of Patient, Healthcare Provider Info</b><br>A hack on Danish pharmaceutical manufacturer Novo Nordisk has compromised some patients' clinical trial information, the maker of popular weight

Bank Info Security
MEDIUMVulnerability

ISACA Survey: AI Adoption Is Rising, Visibility Is Not

<img src="https://ismg-cdn.nyc3.cdn.digitaloceanspaces.com/articles/isaca-survey-ai-adoption-rising-visibility-not-image_small-7-a-31960.jpg" align=right hspace=4><b>Governance Professionals Struggle to Measure ROI and Control AI Systems</b><br>AI is becoming embedded across the enterprise, yet many organizations still can't quantify its value or answer key questions about oversight and control. I

Bank Info Security