Microsoft Office SharePoint is widely deployed; an authenticated remote code execution bug in this core collaboration platform can lead to server compromise and broad enterprise impact.
CVE-2026-63514
Authenticated deserialization RCE in Microsoft Office SharePoint.
Is CVE-2026-63514 being exploited?
Not confirmed. CVE-2026-63514 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.5% probability of exploitation in the next 30 days.
How severe is CVE-2026-63514?
CVE-2026-63514 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-63514?
Yes. A fix has been recorded for CVE-2026-63514. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-63514 affect?
CVE-2026-63514 affects Microsoft Office SharePoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63514?
Apply vendor patch immediately when available; restrict SharePoint access, enforce MFA, and monitor logs/IDS.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can execute arbitrary code remotely via deserialization, enabling server compromise, data theft, and lateral movement.
Immediate action required
- affected>= 16.0.0 and < 16.0.5565.1001
- affected>= 16.0.0 and < 16.0.10417.20198
- affected>= 16.0.0 and < 16.0.19725.20522
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.