CVE-2026-45583: CWE-94: Improper Control of Generation of Code ('Code Injection') in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45583) affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It is classified as CWE-94, indicating improper control of code generation leading to code injection. An attacker without privileges can remotely execute arbitrary code, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, high impact, and required user interaction. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an unauthorized attacker to execute arbitrary code remotely on the affected Exchange Server, potentially leading to full system compromise including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583 to remediate this vulnerability.
CVE-2026-45583: CWE-94: Improper Control of Generation of Code ('Code Injection') in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Description
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45583) affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It is classified as CWE-94, indicating improper control of code generation leading to code injection. An attacker without privileges can remotely execute arbitrary code, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, high impact, and required user interaction. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an unauthorized attacker to execute arbitrary code remotely on the affected Exchange Server, potentially leading to full system compromise including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T19:55:45.729Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583","vendor":"Microsoft"}]
Threat ID: 6a284cdf8dd33fbd85664daf
Added to database: 6/9/2026, 5:26:55 PM
Last enriched: 6/9/2026, 10:10:43 PM
Last updated: 6/10/2026, 6:28:10 AM
Views: 5
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