PT-2026-7363 · Microsoft · Office Excel

Published 2026-02-10 · Updated 2026-02-10 · CVE-2026-21261

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 An out-of-bounds read issue exists in Microsoft Office Excel. This can allow an 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

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-01810

CVE-2026-21261

Affected Products

Office Excel

References · 5

• https://bdu.fstec.ru/vul/2026-01810 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-21261 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21261 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-21261 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21261 · Security Note