tnef vulnerabilities and fixes

Recent CVEs affecting tnef, with upgrade or downgrade steps. 3 tracked.

tnef has 3 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-10-01. Highest priority: CVE-2026-103679 (score 28/100).

• CVE-2026-103678 MEDIUM 5.4 UPGRADE A flaw was found in tnef
• CVE-2026-103679 MEDIUM 6.5 UPGRADE A flaw was found in tnef
• CVE-2026-103680 LOW 3.1 UPGRADE A flaw was found in tnef

FAQ

How do I fix tnef vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is tnef being exploited right now?

None of the tracked tnef CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which tnef CVE should I patch first?

CVE-2026-103679 currently ranks highest (28/100): A flaw was found in tnef.

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