Auth bypass in Yftech Coros Pace 3
CVE-2025-32877
An issue was discovered on COROS PACE 3 devices through 3.0808.0. It identifies itself as a device without input or output capabilities, which results in the use of the Just Works pairing method. This method does not implement any authentication, which therefore allows machine-in-the-middle attacks. Furthermore, this lack of authentication allows attackers to interact with the device via BLE without requiring prior authorization.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
Weakness classification (CWE)
References
- syss.de (Third Party Advisory)
- support.coros.com/hc/en-us/articles/20087694119828-COROS-PACE-3-Release-Notes (Release Notes)
- www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-024.txt (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-32877?
- CVE-2025-32877 is a critical-severity vulnerability in Yftech Coros Pace 3, classified under Improper Authentication. CVSS score: 9.8/10. Published 2025-06-20.
- How severe is CVE-2025-32877?
- Critical severity. CVSS v3 base score is 9.8 out of 10.