CVE-2026-55040 PUBLISHED

Microsoft SharePoint Server Security Feature Bypass Vulnerability

Assigner: microsoft
Reserved: 16.06.2026 Published: 14.07.2026 Updated: 15.07.2026

Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
CVSS Score: 9.1

Product Status

Vendor Microsoft
Product Microsoft SharePoint Enterprise Server 2016
Versions
  • affected from 16.0.0 to 16.0.5561.1001 (excl.)
Vendor Microsoft
Product Microsoft SharePoint Server 2019
Versions
  • affected from 16.0.0 to 16.0.10417.20175 (excl.)
Vendor Microsoft
Product Microsoft SharePoint Server Subscription Edition
Versions
  • affected from 16.0.0 to 16.0.19725.20434 (excl.)

References

Problem Types