PT-2026-2750 · Microsoft · Office Excel

Minjea Park · Published 2026-01-13 · Updated 2026-01-13 · CVE-2026-20950

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 A use-after-free condition exists in Microsoft Office Excel that could 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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-00633

CVE-2026-20950

Affected Products

Office Excel

References · 6

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20950 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00633 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20950 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20950 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20950 · Security Note
• https://twitter.com/CVEnew/status/2011142888722141623 · Twitter Post