CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
A vulnerability was identified in Wahoo Fitness SYSTM App up to 7.2.1 on Android. Impacted is an unknown function of the file com/WahooFitness/SYSTM/BuildConfig.java of the component com.WahooFitness.SYSTM. Such manipulation of the argument SEGMENT_WRITE_KEY leads to use of hard-coded cryptographic key . Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Analysis
Wahoo Fitness SYSTM App on Android up to version 7.2.1 exposes a hard-coded cryptographic key (SEGMENT_WRITE_KEY) in the BuildConfig.java component, allowing local authenticated attackers to manipulate app arguments and potentially inject malicious data or alter user profiles. The vulnerability carries a CVSS score of 1.9 with low confidentiality impact, requires local access and authenticated privileges, and has publicly available exploit code; however, the vendor has not responded to early disclosure notifications.
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External POC / Exploit Code
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EUVD-2026-18613