Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Network-reachable SSRF needing no auth but user interaction (UI:R); scope change (S:C) as the server reaches other systems; high confidentiality but only low integrity given the described spoofing effect.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionCVE.org
Server-side request forgery (ssrf) in Microsoft Dynamics 365 (Online) allows an unauthorized attacker to perform spoofing over a network.
AnalysisAI
Server-side request forgery in Microsoft Dynamics 365 (Online) lets a remote, unauthenticated attacker coerce the cloud service into issuing crafted requests to perform network spoofing, with the CVSS 3.1 score of 9.3 driven by a scope change (S:C) and high confidentiality and integrity impact. Because Dynamics 365 (Online) is a Microsoft-hosted SaaS, exploitation requires victim user interaction (UI:R) and the fix is applied server-side by the vendor. There is no public exploit identified at time of analysis, EPSS is very low (0.04%, 13th percentile), and CISA SSVC scores exploitation as 'none', indicating no observed in-the-wild activity despite the high base score.
Technical ContextAI
The root cause is CWE-918 (Server-Side Request Forgery): the application accepts attacker-influenced input used to build an outbound request, allowing the server to be tricked into contacting an unintended destination. The affected component is Microsoft Dynamics 365 (Online), Microsoft's cloud-hosted CRM/ERP business-application suite (CPE cpe:2.3:a:microsoft:microsoft_dynamics_365_(online):*). In an SSRF against a multi-tenant cloud service, the trust position of the server is what makes it dangerous - the service can typically reach internal endpoints, cloud metadata services, or peer services that an external attacker cannot, which aligns with the scope-change (S:C) metric indicating impact beyond the vulnerable component's own security authority.
RemediationAI
Patch available per vendor advisory: because Dynamics 365 (Online) is a Microsoft-hosted service, Microsoft has remediated the vulnerability server-side and no customer-side patch installation is required - review the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32210 to confirm the fix is deployed to your tenant and whether any tenant-level configuration action is called out. As compensating measures pending confirmation, restrict and monitor Dynamics 365 usage that involves fetching or rendering attacker-supplied URLs, caution users against interacting with untrusted links or content within the application (mitigating the UI:R requirement), and review outbound/network egress logging for anomalous server-initiated requests; the trade-off is largely operational overhead rather than functionality loss since the core fix is vendor-controlled.
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-25309
GHSA-9m2c-xmjv-v2rr