CVE-2026-62839
Microsoft SharePoint Server Spoofing Vulnerability
Insufficiently protected credentials 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
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft SharePoint Server Spoofing Vulnerability
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-62839- 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-522
- Updated
- 2026-11-02
EUVDEUVD-2026-56776
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
EUVD-2026-56776- 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
- 2026-11-02
GitHub AdvisoriesGHSA-59w3-vwvr-9367
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker...
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
GHSA-59w3-vwvr-9367- 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-522
- Updated
- 2026-11-02
NVD
Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-62839- 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-522
- 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-2026-62839 is a medium vulnerability (CVSS 6.5) in Microsoft Sharepoint Server, published August 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.91%, the 60th percentile. No source names a fixed version.