PT-2026-58571 · Microsoft · Office Word+1

CVE-2026-55128 · Published 2026-07-14 · Updated 2026-07-15

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 Word (affected versions not specified)

Description A use after free issue exists that allows an unauthorized attacker to execute arbitrary code locally or remotely, potentially affecting the system. Use after free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed.

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

RCE

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-55128

Affected Products

Office Word

Sharepoint Server

References · 4

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-55128 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-55128 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55128 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077455445371838914 · Twitter Post