CVE-2026-88204
7.3HighPublished 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
- Impact
- High impact on confidentiality, integrity
- Weakness
- CWE-79
Impact
An authenticated attacker can execute arbitrary script in a victim's browser session to spoof actions or steal sensitive session data. Exploitation requires an authorized user account and user interaction, such as clicking a malicious link or visiting a compromised page.
Root cause
SharePoint fails to properly sanitize user input during web page generation, causing a cross-site scripting flaw.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Fix & remediation
Install the security update from the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88204). If patching must wait, restrict access to SharePoint to trusted networks and warn users against following unsolicited links.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
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.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88204PatchVendor Advisory