Vulnerability in Yftech Coros Pace 3
CVE-2025-32878
An issue was discovered on COROS PACE 3 devices through 3.0808.0. It implements a function to connect the watch to a WLAN. This function is mainly for downloading firmware files. Before downloading firmware files, the watch requests some information about the firmware via HTTPS from the back-end API. However, the X.509 server certificate within the TLS handshake is not validated by the device. This allows an attacker within an active machine-in-the-middle position, using a TLS proxy and a self-signed certificate, to eavesdrop and manipulate the HTTPS communication. This could be abused, for example, for stealing the API access token of the assigned user account.
Vulnerability class: Improper Certificate Validation
EPSS: 0.003 (27.2th percentile) — read the EPSS interpretation.
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.
Affected products
- Yftech Coros_pace_3
- Yftech Coros_pace_3_firmware
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Release Notes)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-32878?
- CVE-2025-32878 is a critical-severity vulnerability in Yftech Coros Pace 3, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2025-06-20.
- How severe is CVE-2025-32878?
- Critical severity. CVSS v3 base score is 9.8 out of 10.