ThinkPlus FU100: Authentication Bypass by Spoofing
CVE-2025-13455 is a high-severity authentication bypass by spoofing vulnerability in ThinkPlus FU100 from Lenovo, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected ThinkPlus FU100 versions: Gen 1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.13% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of ThinkPlus FU100 you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on iknow.lenovo.com.cn for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Lenovo | ThinkPlus FU100 | Gen 1 | Not stated |
| Lenovo | ThinkPlus FU200 | Gen 1 | Not stated |
| Lenovo | ThinkPlus TU800 | Gen 1 | Not stated |
| Lenovo | ThinkPlus TSD303 | Gen 1 | Not stated |
| Lenovo | Thinkplus Fu100 Firmware | Not specified in the record | Not stated |
| Lenovo | Thinkplus Fu200 Firmware | Not specified in the record | Not stated |
| Lenovo | Thinkplus Tu800 Firmware | Not specified in the record | Not stated |
| Lenovo | Thinkplus Tsd303 Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (lenovo.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.3 | High | CNA (lenovo.com) |
| CVSS 3.1 | 7.8 | High | CNA (lenovo.com) |
Official description
A vulnerability was reported in ThinkPlus configuration software that could allow a local authenticated user to bypass ThinkPlus device authentication and enroll an untrusted fingerprint.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Spoofing
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
More Authentication Bypass by Spoofing vulnerabilities (CWE-290)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Recent Authentication Bypass by Spoofing vulnerabilities
- 8.1 High severity
- 8.8 High severity
- 7.4 High severity
- 9.8 Critical severity
- 9.3 Critical severity
- 9.8 Critical severity
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