EUVD-2026-56296
GHSA-cp5r-7qc8-wfqr
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Network-reachable by any low-privilege authenticated user with no interaction required; impact is integrity-only as tampering does not expose or deny data.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.
AnalysisAI
Incorrect authorization in Microsoft SharePoint Server exposes authenticated network attackers to unrestrained content tampering across three supported product lines. The flaw, rooted in CWE-863 (Incorrect Authorization), allows a low-privileged but authenticated user to perform write or modification operations that server-side access controls should restrict to higher-privileged roles. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid, authenticated SharePoint account with at minimum low-privilege access, as confirmed by the CVSS PR:L metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 (Medium) is driven by a high integrity impact offset by the low-privilege requirement and absence of confidentiality or availability impact, placing this in a credible but bounded risk tier. … 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 vendor-released patches immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Sharepoint Server
View allMicrosoft SharePoint Server contains a deserialization vulnerability allowing unauthenticated remote code execution over
Microsoft Office SharePoint contains a code injection vulnerability (CVE-2025-49704, CVSS 8.8) enabling authenticated at
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a networ
Microsoft Word Remote Code Execution Vulnerability. Rated critical severity (CVSS 9.8), this vulnerability is remotely e
Microsoft SharePoint Server 2007 SP3, 2010 SP1 and SP2, and 2013; Office Web Apps 2010; Excel 2003 SP3, 2007 SP3, 2010 S
Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Office for Mac 2011, Office fo
Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word Automation Services in SharePoint Server 2010, Web Applica
The default configuration of Microsoft SharePoint Portal Server 2003 SP3, SharePoint Server 2007 SP3 and 2010 SP1 and SP
Microsoft XML Core Services (aka MSXML) 3.0, 5.0, and 6.0 does not properly parse XML content, which allows remote attac
Microsoft Excel 2007 SP3, 2010 SP1 and SP2, 2013, and 2013 RT; Office 2007 SP3, 2010 SP1 and SP2, 2013, and 2013 RT; Off
Microsoft Word Automation Services in SharePoint Server 2010 SP1, Word Web App 2010 SP1 in Office Web Apps 2010, Word 20
Microsoft Word Automation Services in SharePoint Server 2010 SP1 and SP2, Word Web App 2010 SP1 and SP2 in Office Web Ap
Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today