EUVD-2026-56775
GHSA-ph9c-74mv-vfx2
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Network vector and low complexity confirmed; PR:L because 'authorized attacker' requires valid credentials; C:H for internal resource disclosure via SSRF; no integrity or availability impact described.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
AnalysisAI
Server-Side Request Forgery in Microsoft SharePoint Server 2016, 2019, and Subscription Edition enables authenticated network-adjacent attackers to coerce the SharePoint server into issuing outbound HTTP requests to attacker-controlled or internal network destinations, resulting in high-confidentiality-impact spoofing. The CVSS:3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) confirms exploitation is low-complexity, requires only a standard SharePoint account, and yields significant information disclosure with no integrity or availability loss. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SharePoint user account with at least basic authenticated access to the target SharePoint installation - the CVSS PR:L metric and the description's 'authorized attacker' language both confirm this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 6.5 reflects medium severity, driven primarily by the high confidentiality impact and the low-privilege, network-accessible attack vector with low complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft-released cumulative updates that address this vulnerability: for SharePoint Enterprise Server 2016, update to build 16.0.5565.1001 or later; for SharePoint Server 2019, update to build 16.0.10417.20198 or later; for SharePoint Server Subscription Edition, update to build 16.0.19725.20522 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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