PT-2026-29439 · Microsoft · Office

Published 2026-04-01 · Updated 2026-04-28 · CVE-2026-3779

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 Multiple / Unspecified Products (affected versions not specified)

Description The application's list box calculate array logic retains outdated references to page or form objects after their deletion or recreation. This allows specially crafted documents to trigger a use-after-free condition during calculation, potentially leading to arbitrary code execution.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-3779

Affected Products

Office

References · 7

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2026-2365 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-3779 · Security Note
• https://foxit.com/support/security-bulletins.html · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/730247 · Security Note
• https://t.me/cveNotify/161253 · Telegram Post
• https://twitter.com/CVEarity/status/2039301603606565194 · Twitter Post
• https://twitter.com/CVEnew/status/2039279688682766470 · Twitter Post