CVE-2025-32877: coros pace 3 Auth Bypass — Exploit

Description

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.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-287 Improper Authentication

Affected Products

Vendor	Product	Versions
yftech	coros_pace_3_firmware	< 3.0808.0
yftech	coros_pace_3	All

References

Exploits

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-024.txt https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-024.txt

Other References

https://support.coros.com/hc/en-us/articles/20087694119828-COROS-PACE-3-Release-Notes https://syss.de

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-32877? +

CVE-2025-32877 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-32877? +

CVE-2025-32877 affects products from yftech, specifically: coros_pace_3, coros_pace_3_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-32877? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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