Threat Intelligence / CVE / CVE-2023-21529

CVE-2023-21529

CVSS 8.8 (HIGH) · EPSS 36.7% · Priority 8.3/10 · Published 2023-02-14

As of 2024-11-21, CVE-2023-21529 is a CVSS 8.8 (HIGH-severity) vulnerability. EPSS exploitation probability 36.7%. Threadlinqs Intelligence tracks 2 threats exploiting it.

Last updated: 2024-11-21

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-502, NVD-CWE-noinfo

Threats tracking this CVE

CISA KEV Catalog Update: Seven Actively Exploited Vulnerabilities Added 2026-04-13 (Microsoft, Adobe, Fortinet) — CRITICAL
Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035) — CRITICAL

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529

Full detection coverage & IOCs for threats exploiting CVE-2023-21529 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.