HomeMicrosoftCVE-2026-21258

CVE-2026-21258

MEDIUM
5.5CVSS
Published: 2026-02-10
Updated: 2026-02-11
AI Analysis

Description

Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS Metrics

Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector
local
Complexity
low
Privileges
none
User Action
required
Scope
unchanged
Confidentiality
high
Integrity
none
Availability
none
Weaknesses
CWE-20CWE-125

Metadata

Primary Vendor
MICROSOFT
Published
2/10/2026
Last Modified
2/11/2026
Source
NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : 365_appsmicrosoft : 365_appsmicrosoft : excelmicrosoft : excelmicrosoft : officemicrosoft : officemicrosoft : office_long_term_servicing_channelmicrosoft : office_long_term_servicing_channelmicrosoft : office_long_term_servicing_channelmicrosoft : office_long_term_servicing_channelmicrosoft : office_long_term_servicing_channelmicrosoft : office_long_term_servicing_channelmicrosoft : office_online_server

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CVE-CVE-2026-21258 | MEDIUM Severity | CVEDatabase.com | CVEDatabase.com