CVE-2026-55126
mediumImproper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform sp…
Vendor / product: Microsoft — sharepoint server
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CVSS
5.4
5.4 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-07-14 18:18
Modified: 2026-11-03 23:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-11-03 23:24 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 <16.0.19725.20434, 2016, 2019
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-2026-55126
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55126
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55126 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 23:24 UTC · record ↗