TI-2020-00623 Aliases CVE-2020-0647 GHSA-r3cv-6vrm-m2pf

Origin validation error in Microsoft Office Online Server

LOW 26CWE-346Published 2020-01-14 · Updated 2024-08-04

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-346.

Summary

A spoofing vulnerability exists when Office Online does not validate origin in cross-origin communications correctly, aka 'Microsoft Office Online Spoofing Vulnerability'.

Why it matters now

EPSS 0.00983 62nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	Office Online Server	all versions	—	No fix listed	CNA

Office Online Server VendorMicrosoft Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

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

cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-0647
2026-10-03 Alias added: GHSA-r3cv-6vrm-m2pf

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0647

TI-2017-08774 Memory corruption in Microsoft Office KEVCVSS 3.1HIGH 7.8
TI-2023-08100 Microsoft Word Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
TI-2021-13528 Microsoft Excel Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
TI-2023-15335 Microsoft Excel Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
TI-2023-16312 Microsoft Excel Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
TI-2018-00733 Out-of-bounds write in Microsoft Word CVSS 3.0HIGH 8.8

See all 280 →

Sources

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