CVE-2025-32876

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-20 · updated 2026-06-17
Weakness: CWE-306

Description

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.

Affected products

Yftech Coros Pace 3 Firmware: through 3.0808.0

References

https://support.coros.com/hc/en-us/articles/20087694119828-COROS-PACE-3-Release-Notes
https://syss.de
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-023.txt
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-023.txt

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