CVE-2016-6541 | TrackR Bravo device allows unauthenticated pairing, which enables unauthenticated connected applications to write to various device attributes

TrackR Bravo device allows unauthenticated pairing, which enables unauthenticated connected applications to write to various device attributes. Updated apps, version 5.1.6 for iOS and 2.2.5 for Android, have been released by the vendor to address the vulnerabilities in CVE-2016-6538, CVE-2016-6539, CVE-2016-6540 and CVE-2016-6541.

Published: 2018-07-06 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6541 is rated Moderate Risk (59.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.63%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-6541

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-20 0.77% 0.63% -0.13%
2 2025-10-03 0.95% 0.77% -0.18%
3 2025-07-24 — 0.95% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6541

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
5.8 2.0 MEDIUM
AV:A/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 6.4 [email protected]

Weakness enumeration for CVE-2016-6541

Affected software / configurations for CVE-2016-6541

Vendor Product Version Raw CPE
thetrackr trackr_bravo_firmware < 2.2.5 cpe:2.3:o:thetrackr:trackr_bravo_firmware:*:*:*:*:*:android:*:*
thetrackr trackr_bravo_firmware < 5.1.6 cpe:2.3:o:thetrackr:trackr_bravo_firmware:*:*:*:*:*:iphone_os:*:*

References for CVE-2016-6541

URL Tags
http://www.securityfocus.com/bid/93874 Third Party Advisory VDB Entry
https://blog.rapid7.com/2016/10/25/multiple-bluetooth-low-energy-ble-tracker-vulnerabilities/ Third Party Advisory
https://www.kb.cert.org/vuls/id/617567 Third Party Advisory US Government Resource
https://www.kb.cert.org/vuls/id/TNOY-AF3KCZ Third Party Advisory US Government Resource
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