CVE-2025-64677 HIGH

CVE-2025-64677: Office Out-of-Box Experience Spoofing Vulnerability

Vendor Microsoft

Product Office Out-of-Box Experience

Weakness CWE-79 · XSS

Published December 18, 2025

Last update April 16, 2026

View on NVD All CVEs

CVSS base score

8.2/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 18, 2025 CVE published

April 16, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-64677 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

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04Related CVE

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