Vulnerabilities
CVE-2026-102860: SharePoint Elevation of Privilege via Improper Access Control
Microsoft Office SharePoint contains an access‑control flaw that permits an authenticated user to elevate privileges across the network. The vulnerability, identified as CVE‑2026‑102860, could allow attackers to gain higher‑level permissions within SharePoint environments. Defenders should verify patch status, restrict privileged access, and monitor for anomalous privilege changes.
What happened
Microsoft Office SharePoint has a flaw that lets an attacker with authorized access raise their privileges across the network.
Impact
Authenticated users can potentially gain elevated rights, enabling broader access to SharePoint content and underlying systems.
Mitigation
- Apply the latest security updates from Microsoft as soon as they are released.
- Restrict privileged SharePoint permissions to the minimum necessary.
- Implement network segmentation to limit lateral movement.
- Enable audit logging and monitor for privilege escalation events.
What to do
Check your SharePoint version and patch level, enforce least‑privilege access controls, and review audit logs for suspicious privilege changes. If a patch is not yet available, consider disabling features that rely on the vulnerable component until remediation is applied.
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