Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
History

Mon, 26 Jan 2026 21:30:00 +0000


Mon, 26 Jan 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-01-26T00:00:00+00:00', 'dueDate': '2026-02-16T00:00:00+00:00'}


Mon, 26 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 26 Jan 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C'}


Mon, 26 Jan 2026 17:30:00 +0000

Type Values Removed Values Added
Description Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
Title Microsoft Office Security Feature Bypass Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 2016
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Weaknesses CWE-807
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_2016:*:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2016
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-01-26T21:05:34.636Z

Reserved: 2025-12-30T18:10:54.844Z

Link: CVE-2026-21509

cve-icon Vulnrichment

Updated: 2026-01-26T19:14:57.747Z

cve-icon NVD

Status : Received

Published: 2026-01-26T18:16:38.540

Modified: 2026-01-26T21:15:56.120

Link: CVE-2026-21509

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.