CVE-2026-65813: 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, identified as CWE-918, involves server-side request forgery in Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). An attacker with authorized network access can exploit this flaw to elevate their privileges. The vulnerability has been assigned CVE-2026-65813 and has a CVSS v3.1 base score of 6.5, indicating medium severity. Microsoft has published an official fix for this issue, and the vendor advisory is available at the Microsoft Security Response Center.
Potential Impact
An authorized attacker can leverage this SSRF vulnerability to elevate privileges within the network environment where the affected Microsoft Exchange Server 2016 CU23 is deployed. The confidentiality impact is high, but integrity and availability impacts are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for Exchange Server 2016 Cumulative Update 23 as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65813.
CVE-2026-65813: 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 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-918, involves server-side request forgery in Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). An attacker with authorized network access can exploit this flaw to elevate their privileges. The vulnerability has been assigned CVE-2026-65813 and has a CVSS v3.1 base score of 6.5, indicating medium severity. Microsoft has published an official fix for this issue, and the vendor advisory is available at the Microsoft Security Response Center.
Potential Impact
An authorized attacker can leverage this SSRF vulnerability to elevate privileges within the network environment where the affected Microsoft Exchange Server 2016 CU23 is deployed. The confidentiality impact is high, but integrity and availability impacts are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for Exchange Server 2016 Cumulative Update 23 as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65813.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-22T21:36:47.630Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65813","vendor":"Microsoft"}]
Threat ID: 6a7b5833bf8831d5391564d6
Added to database: 08/11/2026, 17:13:23 UTC
Last enriched: 08/11/2026, 19:29:11 UTC
Last updated: 08/12/2026, 00:35:45 UTC
Views: 5
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