CVE-2026-45504: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45504) affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It is classified as CWE-918, a Server-Side Request Forgery (SSRF) issue, which enables an authorized attacker to perform SSRF attacks that can lead to privilege escalation over the network. The CVSS 3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can elevate their privileges on the affected Microsoft Exchange Server, potentially gaining unauthorized access or control. The impact is rated high due to the potential for full compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504 to remediate this vulnerability.
CVE-2026-45504: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Description
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45504) affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It is classified as CWE-918, a Server-Side Request Forgery (SSRF) issue, which enables an authorized attacker to perform SSRF attacks that can lead to privilege escalation over the network. The CVSS 3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can elevate their privileges on the affected Microsoft Exchange Server, potentially gaining unauthorized access or control. The impact is rated high due to the potential for full compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T16:07:22.619Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504","vendor":"Microsoft"}]
Threat ID: 6a284cdf8dd33fbd85664dac
Added to database: 6/9/2026, 5:26:55 PM
Last enriched: 6/9/2026, 10:10:49 PM
Last updated: 6/10/2026, 5:14:51 AM
Views: 3
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