TI-2025-40032 Aliases CVE-2025-64677 GHSA-589g-82vw-vxfr

Office Out-of-Box Experience Spoofing Vulnerability

MEDIUM 42CWE-79Published 2025-12-18 · Updated 2026-04-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: High · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00492 42nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	Office Out-of-Box Experience	-	—	No fix listed	CNA

Office Out-of-Box Experience VendorMicrosoft Affected - Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:office_out-of-box_experience:-:::::::*	not specified by NVD	Vulnerable	Microsoft

cpe:2.3:a:microsoft:office_out-of-box_experience:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact: Spoofing
Exploited: No
Publicly disclosed: No
Exploitability: —

Timeline

2026-10-02 Threatist record created from CVE-2025-64677
2026-10-03 Alias added: GHSA-589g-82vw-vxfr

References

Patch 1

Office Out-of-Box Experience Spoofing Vulnerability

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences