CVE-2023-21529
HIGHCVSS 8.8/10Actively ExploitedEPSS 62.10%
Last modified
CVE-2023-21529 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Microsoft Exchange Server Remote Code Execution Vulnerability. CISA has confirmed active exploitation in the wild. EPSS estimates a 62.10% chance of exploitation in the next 30 days.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Metrics
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Exchange Server | 2013 | Cumulative Update 23 |
| Microsoft | Exchange Server | 2016 | Cumulative Update 23 |
| Microsoft | Exchange Server | 2019 | Cumulative Update 11 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2023-21529?
Microsoft Exchange Server Remote Code Execution Vulnerability
How severe is CVE-2023-21529?
CVE-2023-21529 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 62.10% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2023-21529?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2023
- CVE-2023-21523 A Stored Cross-site Scripting (XSS) v…5.4
- CVE-2023-21524Windows Local Security Authority (LSA) Elevation of Privileg…7.8
- CVE-2023-21525Remote Procedure Call Runtime Denial of Service Vulnerabilit…5.3
- CVE-2023-21526Windows Netlogon Information Disclosure Vulnerability7.4
- CVE-2023-21527Windows iSCSI Service Denial of Service Vulnerability7.5
- CVE-2023-21528Microsoft SQL Server Remote Code Execution Vulnerability7.8
- CVE-2023-2153A vulnerability was found in SourceCodester Complaint Manage…6.1
- CVE-2023-21531Azure Service Fabric Container Elevation of Privilege Vulner…7
- CVE-2023-21532Windows GDI Elevation of Privilege Vulnerability7
- CVE-2023-21535Windows Secure Socket Tunneling Protocol (SSTP) Remote Code …8.1
- CVE-2023-21536Event Tracing for Windows Information Disclosure Vulnerabili…4.7
- CVE-2023-21537Microsoft Message Queuing (MSMQ) Elevation of Privilege Vuln…7.8
Are you affected by CVE-2023-21529?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST