CVE-2026-88163
highInteger overflow or wraparound in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Vendor / product: Microsoft — sharepoint server
Integer overflow or wraparound in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:21
Modified: 2026-10-14 19:44
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:00 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / sharepoint_server <16.0.20326.20190
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88163
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88163
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88163 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:00 UTC · record ↗