Auth bypass in Yftech Coros Pace 3
CVE-2025-32876
An issue was discovered on COROS PACE 3 devices through 3.0808.0. The BLE implementation of the COROS smartwatch does not support LE Secure Connections and instead enforces BLE Legacy Pairing. In BLE Legacy Pairing, the Short-Term Key (STK) can be easily guessed. This requires knowledge of the Temporary Key (TK), which, in the case of the COROS Pace 3, is set to 0 due to the Just Works pairing method. An attacker within Bluetooth range can therefore perform sniffing attacks, allowing eavesdropping on the communication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
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-2025-023.txt (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-32876?
- CVE-2025-32876 is a medium-severity vulnerability in Yftech Coros Pace 3, classified under Missing Authentication for Critical Function. CVSS score: 6.8/10. Published 2025-06-20.
- How severe is CVE-2025-32876?
- Medium severity. CVSS v3 base score is 6.8 out of 10.