---
id: CVE-2025-64677
title: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') in Office Out-of-Box Experience allows an unauthorized attacker to
  perform spoofing over a network.
summary: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') in Office Out-of-Box Experience allows an unauthorized attacker to
  perform spoofing over a network.
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-79
vendor: microsoft
product: office_out-of-box_experience
affected:
  - office_out-of-box_experience
published: '2025-12-18'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T16:10:00.257'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-64677'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64677'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00523
epssPercentile: 0.42257
ingestedAt: '2026-10-01T18:55:42.307Z'
---

## Overview

Improper neutralization of input during web page generation ('cross-site scripting') in Office Out-of-Box Experience allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `office_out-of-box_experience`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.