CVE-2026-45502: 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 disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45502) involves SSRF in Microsoft Exchange Server 2016 CU23, where an authorized attacker can cause the server to make unintended network requests, potentially disclosing information. The CVSS 3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, and partial confidentiality impact. Microsoft has published an official fix for this issue.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can cause the Exchange Server to disclose information over the network. The impact is limited to confidentiality with no integrity or availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45502 to remediate this vulnerability.
CVE-2026-45502: 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 disclose information over a network.
CVSS v3.1
Score 5.0medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45502) involves SSRF in Microsoft Exchange Server 2016 CU23, where an authorized attacker can cause the server to make unintended network requests, potentially disclosing information. The CVSS 3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, and partial confidentiality impact. Microsoft has published an official fix for this issue.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can cause the Exchange Server to disclose information over the network. The impact is limited to confidentiality with no integrity or availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45502 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-2026-45502","vendor":"Microsoft"}]
Threat ID: 6a284cdf8dd33fbd85664da6
Added to database: 6/9/2026, 5:26:55 PM
Last enriched: 6/9/2026, 10:12:03 PM
Last updated: 6/10/2026, 5:00:56 AM
Views: 3
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