CVE-2026-56157
Microsoft SharePoint Server Spoofing Vulnerability
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft SharePoint Server Spoofing Vulnerability
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-56157- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2026-44233
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
EUVD-2026-44233- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p7vq-vr5c-p2r6
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform...
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
GHSA-p7vq-vr5c-p2r6- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-56157- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-56157 is a medium vulnerability (CVSS 5.4) in Microsoft Sharepoint Server, published July 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 42nd percentile. No source names a fixed version.