CVE-2026-88204Microsoft Office SharePoint Spoofing Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft SharePoint Server Subscription Edition and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.63%, higher than 49% of scored CVEs.
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Free account, 1 product
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
- 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.63% (percentile 49)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
Microsoft Microsoft SharePoint Server Subscription Edition microsoft:sharepoint_server_subscription_edition (from the name) | from 16.0.0 before 16.0.20326.20190 | CNA record |
microsoft sharepoint_server microsoft:sharepoint_server | before 16.0.20326.20190 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88204vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.