VDB
CVE-2026-109454
CVE-2026-109454
PUBLISHED
CVSS 9 CRITICAL
Microsoft Office SharePoint Spoofing Vulnerability
Reported by microsoft · Published November 10, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Microsoft SharePoint Server Subscription Edition | Microsoft | 16.0.20326.20278 |
Risk scores
CVSS 3.1
9
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 |
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 |
| microsoft | sharepoint_server | 16.0.0 |
Timeline
- Nov 10, 2026 CVE Published
- Nov 10, 2026 CVE Updated
- Nov 11, 2026 EPSS Score
- Nov 11, 2026 Coalition ESS Score
- Nov 12, 2026 Security Advisory
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-109454
vulnetix vdb fixes CVE-2026-109454Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-109454/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- Microsoft Office SharePoint Spoofing Vulnerability vendor-advisorypatch