Is CVE-2026-103679 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103679?

CVE-2026-103679 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-103679

Description

A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).