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, identified as CWE-918, affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It enables an authorized attacker to perform SSRF attacks, potentially leading to information disclosure over the network. The vulnerability has been assigned CVE-2026-45502 and has a CVSS v3.1 base score of 5.0, indicating medium severity. Microsoft has released an official fix for this issue, as documented in their security update guide.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can disclose information over the network. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
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 security update guide 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
Affected software
Microsoft
Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft
Microsoft Exchange Server 2019 Cumulative Update 14
Microsoft
Microsoft Exchange Server 2019 Cumulative Update 15
Microsoft
Microsoft Exchange Server Subscription Edition RTM
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-918, affects Microsoft Exchange Server 2016 Cumulative Update 23 (version 15.01.0.0). It enables an authorized attacker to perform SSRF attacks, potentially leading to information disclosure over the network. The vulnerability has been assigned CVE-2026-45502 and has a CVSS v3.1 base score of 5.0, indicating medium severity. Microsoft has released an official fix for this issue, as documented in their security update guide.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can disclose information over the network. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
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 security update guide 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: 06/09/2026, 17:26:55 UTC
Last enriched: 08/14/2026, 13:38:02 UTC
Last updated: 09/11/2026, 22:06:33 UTC
Views: 165
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