Affects Microsoft SharePoint, a widely used enterprise product; network privilege escalation (CVSS 8.8) can enable admin takeover and widespread impact.
CVE-2026-62827
Authentication flaw in Microsoft SharePoint allows network privilege escalation.
Is CVE-2026-62827 being exploited?
Not confirmed. CVE-2026-62827 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 0.73% probability of exploitation in the next 30 days.
How severe is CVE-2026-62827?
CVE-2026-62827 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-2026-62827?
Yes. A fix has been recorded for CVE-2026-62827. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-62827 affect?
CVE-2026-62827 affects Microsoft Office SharePoint, Microsoft SharePoint Server (on-prem). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-62827?
Apply Microsoft patch when released; restrict admin accounts and monitor SharePoint logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorized attacker can elevate privileges over the network in SharePoint, enabling admin takeover, data access, and lateral movement.
Patch when possible
- 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.