Security readout for executives and security teams
Plain-English summary
This flaw could let someone with physical access to certain Trezor hardware wallets recover the recovery phrase during initial setup using side-channel analysis. If successful, they could steal wallet assets. The issue is reported as patched, but the provided sources do not specify detailed update instructions.
Executive priority
Treat as a targeted physical-access risk to cryptocurrency assets. Prioritize users or organizations holding significant funds on affected Trezor firmware, but do not treat it like a broad remote enterprise compromise.
Technical view
CVE-2025-69893 is a side-channel issue in BIP-39 mnemonic processing observed in Trezor One, Trezor T, and Trezor Safe firmware v1.13.0 to v1.14.0. Non-constant-time word searching and branch patterns can leak information through a single physical trace analyzed with profiling-based DL-SCA.
Likely exposure
Exposure appears limited to affected Trezor hardware wallet models on firmware v1.13.0 through v1.14.0, especially during initial setup or mnemonic processing. Remote-only attackers are not indicated by the CVSS vector.
Exploitation context
The CVE requires physical access and side-channel collection during setup. The source bundle does not show CISA KEV listing or public active exploitation. Successful exploitation targets confidentiality of the mnemonic phrase, not device availability.
Researcher notes
The root issue is tied to BIP-39 mnemonic word-search behavior causing non-constant-time execution and branch leakage. Sources state the issue was patched, but the bundle lacks patch version specifics and detailed reproduction data. Avoid assuming broader wallet impact beyond the named Trezor firmware ranges.
Mitigation direction
- Check Trezor’s advisory for the patched firmware and upgrade guidance.
- Avoid initializing affected wallets in untrusted or observable environments.
- If setup occurred under suspicious physical conditions, consider rotating funds to a new secure wallet.
- Follow vendor guidance before restoring or reusing potentially exposed mnemonics.
Validation and detection
- Inventory Trezor One, Trezor T, and Trezor Safe devices in use.
- Confirm firmware versions and identify any v1.13.0 to v1.14.0 devices.
- Review whether affected devices were initialized in controlled physical environments.
- Document vendor advisory status and remediation evidence for each device.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-385: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-69893 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N0.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
4.6MediumVector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://trezor.io/vulnerability/fix-side-channel-in-bip-39-mnemonic-processing-when-unlockedCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Covert Timing Channel
Covert Timing Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.