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CVE-2026-111309

Invalid pointer release allows code execution in Outlook

CVSS 3.1
8.8 high
EPSS
—
Published
·
Modified
Analyze CVE-2026-111309 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Microsoft Office Outlook mishandles release of an invalid pointer or reference. An unauthenticated attacker on the network can run code if a user interacts with attacker-controlled content. Successful exploitation can fully compromise confidentiality, integrity, and availability of the Outlook process. Microsoft has not listed affected builds.

What to do: Apply Microsoft's update for CVE-2026-111309. No workaround is stated.

ProductAffected
Microsoft Office Outlook—
Estimated exposure
largeNo basis for an estimate.

Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.

Description · NVD

Release of invalid pointer or reference in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Weakness
CWE-763
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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