Double free in Microsoft Office - CVE-2026-97749
Published: October 14, 2026
Vulnerability identifier: #VU155572
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97749
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to double free in Microsoft Office Outlook when rendering email messages in the Reading Pane. A remote attacker can send a specially crafted email message to execute arbitrary code on the recipient's system.
Exploitation does not require the recipient to open the message or click anything in it.
Affected software
Microsoft Office
How to mitigate CVE-2026-97749
Install security update from vendor's website.
Microsoft Office - addressed in versions 16.0.14334.20974, 16.0.17932.21056