CVE-2026-65058 Trezor Safe improper security check in on-device display
Attackers can trick users into signing malicious Ethereum transactions by exploiting a flaw in how the device displays and binds calldata chunks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-65058?
CVE-2026-65058 is a medium-severity vulnerability in Trezor Safe 3, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confirmation-binding flaw in the Ethereum sign_tx / sign_tx_eip1559 flow. For contract interactions, the device confirms only the initial calldata chunk while the signature commits to the full streamed calldata. An attacker could present calldata to a victim then supply a different tail that changes the signed transaction. Fixed in 70c9b0c.
Weakness: CWE-358
Which versions are affected by CVE-2026-65058?
How do I fix CVE-2026-65058?
No fix has been published for CVE-2026-65058 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-65058 being exploited?
There is no known exploitation of CVE-2026-65058 in the wild and no public exploit code.
Sources
Also known as GHSA-6552-m3hr-mqwj.