CVE-2026-109455
Microsoft Office SharePoint Information Disclosure Vulnerability
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose information 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
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Office SharePoint Information Disclosure Vulnerability
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
- Record
CVE-2026-109455- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-863
- Updated
- 2026-11-10
EUVDEUVD-2026-121573
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
- Record
EUVD-2026-121573- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-hfx7-rwxw-67pj
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose...
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
- Record
GHSA-hfx7-rwxw-67pj- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-10
NVD
Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
- Record
CVE-2026-109455- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-11
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-109455 is a medium vulnerability (CVSS 6.5) in Microsoft Sharepoint Server Subscription Edition, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.93%, the 61st percentile. No source names a fixed version.