PT-2026-7360 · Microsoft · Office Excel

Minjea Park · Published 2026-02-10 · Updated 2026-02-10 · CVE-2026-21258

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified)

Description Improper input validation in Microsoft Office Excel can allow an unauthorized attacker to disclose information locally. The issue allows attackers to obtain sensitive information and affect the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

RCE

Weakness Enumeration

CWE-125

CWE-20

Related Identifiers

BDU:2026-01781

CVE-2026-21258

Affected Products

Office Excel

References · 5

• https://osv.dev/vulnerability/CVE-2026-21258 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01781 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21258 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21258 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-21258 · Security Note