EUVD-2026-73973
GHSA-64x9-rjhq-9h3x
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Bluetooth is physically adjacent-range, not network; AV:A corrects vendor AV:N; PR:L retained as connection required; C:L only, no I/A impact.
Primary rating from Vendor (android).
CVSS VectorVendor: android
Lifecycle Timeline
6DescriptionCVE.org
In btm_sec_encrypt_change of btm_sec.cc, there is a possible downgrade attack due to a logic error in the code. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
AnalysisAI
Bluetooth encryption downgrade in Android's btm_sec_encrypt_change function (btm_sec.cc) exposes information on Android 17 and Android 16-QPR2 devices by allowing a logic error in encryption change handling to be exploited without user interaction. A Bluetooth-adjacent attacker with a low-privilege connection can trigger the downgrade, reducing encryption strength and enabling passive interception of Bluetooth traffic. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be within Bluetooth radio range of the target device (typically 10-100 meters depending on hardware class), limiting the attacker pool to physically proximate adversaries. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) reflects limited impact: confidentiality-only with no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the patches distributed in the Android Security Bulletin for 2026-09-01 (https://source.android.com/docs/security/bulletin/2026/2026-09-01), which addresses the logic error in `btm_sec_encrypt_change`. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Information Disclosure
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External POC / Exploit Code
Leaving vuln.today