Auth bypass in Yftech Coros Pace 3
CVE-2025-32879
An issue was discovered on COROS PACE 3 devices through 3.0808.0. It starts advertising if no device is connected via Bluetooth. This allows an attacker to connect with the device via BLE if no other device is connected. While connected, none of the BLE services and characteristics of the device require any authentication or security level. Therefore, any characteristic, depending on their mode of operation (read/write/notify), can be used by the connected attacker. This allows, for example, configuring the device, sending notifications, resetting the device to factory settings, or installing software.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · 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-2025-026.txt (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-32879?
- CVE-2025-32879 is a high-severity vulnerability in Yftech Coros Pace 3, classified under Improper Authentication. CVSS score: 8.8/10. Published 2025-06-20.
- How severe is CVE-2025-32879?
- High severity. CVSS v3 base score is 8.8 out of 10.