CVE-2023-21529CISA KEVEPSS p99.1%

CVE-2023-21529CVE-2023-21529

microsoft / exchange_server

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Scoring

CVSS 8.8 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS62.10% probability of exploitation · percentile 99.1% · 2026-06-18T12:00:27Z
Last modified2026-06-17

CISA KEV entry

Added to KEV: 2026-04-13

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Exchange Server Deserialization of Untrusted Data Vulnerabilitykev-cve-2023-215290%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Microsoft Exchange Server Remote Code Execution Vulnerability
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Microsoft Exchange Server Information Disclosure Vulnerability
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Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
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CVE-2026-21531
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CVE-2026-33112
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CVE-2026-45583
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.