Quick answers
- Is CVE-2026-103679 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103679 being exploited in the wild.
- How severe is CVE-2026-103679?
- Medium severity, with a CVSS score of 6.5, published 1 October 2026.
- Which products and versions are affected?
- verdammelt tnef.
- Is there a fix for CVE-2026-103679?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-103679 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-103679?
- Check whether you run Tnef Project Tnef or Verdammelt Tnef. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A use-after-free and double-free vulnerability exists in the get_body_files() function when processing TNEF files with multiple message bodies. The flaw is triggered during extraction of specially crafted TNEF files due to improper memory management. A remote attacker can send the malicious file to trigger a crash; no authentication or user interaction beyond receiving the file is required.
Affected products
- verdammelt tnef
Timeline
- 2026-10-01: disclosed