PT-2026-2746 · Microsoft · Office Excel

Devoke + 2 · Published 2026-01-13 · Updated 2026-01-13 · CVE-2026-20946

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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 unauthorized attacker to execute code locally.

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

RCE

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-00388

CVE-2026-20946

Affected Products

Office Excel

References · 6

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20946 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20946 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20946 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20946 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00388 · Security Note
• https://twitter.com/CVEnew/status/2011181536864059551 · Twitter Post