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Android CVE-2026-28606

| EUVDEUVD-2026-73958 CRITICAL
Improper Authentication (CWE-287)
2026-09-08 security@android.com GHSA-974c-8m68-6h7c
9.8
CVSS 3.1 · Vendor: android
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Approach target within Bluetooth range
  2. Delivery
    Initiate bonding to device
  3. Exploit
    Trigger logic error in handleBondStateChanged
  4. Execution
    Bond registered without pairing consent
  5. Impact
    Gain elevated privileges as trusted peer

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the target's Bluetooth to be enabled and the attacker to be within Bluetooth radio range and able to initiate a bonding exchange with the device; the pairing/consent step is what is bypassed, so no user approval and no prior authentication (PR:N/UI:N) are needed. Limiting factors: physical proximity (Bluetooth range, not Internet-wide despite AV:N), the device having Bluetooth on and reachable, and the target running Android 15, 16, 16-qpr2, or 17 without the 2026-09-01 patch level. No specific non-default configuration is called out in the description.

Impact

The signals conflict sharply and should be read together. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, C:H/I:H/A:H = 9.8) describes a maximally severe, no-prerequisite remote escalation, and Google's SSVC 'Technical Impact: total' agrees the impact ceiling is complete device compromise. Counterweighing that, SSVC records Exploitation: none and Automatable: no, and EPSS is only 0.16% (5th percentile), so there is no evidence of exploitation and no public exploit at time of analysis. Importantly, Bluetooth is a radio-proximity technology: despite the AV:N label, realistic exploitation requires the attacker to be within Bluetooth range of the target, which materially limits mass or remote-Internet exploitation and makes this closer to a proximity attack than a wormable network one. The net picture is a genuinely high-severity, high-priority patch (total impact, zero user interaction, no privileges needed) but not an emergency-drop-everything item absent active exploitation; any organization managing a fleet of Android devices should treat the September bulletin as urgent and roll it out on their normal expedited cadence. Verify the AV:N assumption against your threat model - the description says 'remote' but the Bluetooth attack surface is proximity-bound.

Exploit ScenarioDerived

An attacker within Bluetooth range of a victim's phone initiates a bond and, by exploiting the flawed handleBondStateChanged logic, is registered as a bonded/trusted device without the victim ever approving pairing. Having bypassed consent, the attacker gains the elevated Bluetooth privileges of a paired peer and can access device functions/data the pairing gate was meant to protect. No public proof-of-concept is identified, and no user interaction is required on the victim's side.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 10, 2026

Remote privilege escalation in the Android Bluetooth stack (AdapterService.java) allows an attacker to bypass device pairing entirely. A logic error in handleBondStateChanged lets a bond be treated as established without the normal pairing/consent flow, granting the attacker elevated privileges on Android 15, 16, 16-qpr2, and 17 with no user interaction. Google rates it CVSS 9.8; no public exploit is identified and CISA's SSVC framework records exploitation status as none, and EPSS is very low (0.16%).

RemediationAI

Apply the Android Security Bulletin update dated 2026-09-01 (security patch level 2026-09-01 or later) as soon as it is available for your devices; this AOSP fix corrects the bond-state handling in AdapterService and is the primary and complete remediation (https://source.android.com/docs/security/bulletin/2026/2026-09-01). No exact numeric fix version beyond the September 2026 patch level is provided in the input. Until the patch is installed, the most effective compensating control is to disable Bluetooth when not needed or keep devices out of Bluetooth range of untrusted parties, and avoid discoverable/pairing mode in public; the trade-off is loss of Bluetooth accessories, wearables, and car connectivity. For managed fleets, use MDM policy to disable Bluetooth or enforce the September patch level as a compliance gate.

Affected VersionsENISA

Android 16
Android 17
Android 16-qpr2
Android 15

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw lives in the Android Bluetooth subsystem's AdapterService, which manages device bonding state transitions. handleBondStateChanged is the callback that processes changes to a remote device's bond state (none/bonding/bonded); a logic error there causes the code to reach a 'bonded/trusted' outcome even when the pairing (authentication/consent) step should have gated it. Bonding normally requires user confirmation (numeric comparison, passkey, or Just Works with consent) before a peer is trusted; skipping it means an unpaired peer is treated as an authenticated, bonded device. No CWE was assigned by the source, but the root cause class is an authentication/authorization logic error (improper enforcement of the pairing state machine). Affected code ships in AOSP and thus in effectively all Android 15-17 builds using the standard Bluetooth stack.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (android) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Bluetooth is proximity-bound so AV:A (adjacent) rather than AV:N; no pairing/consent needed (PR:N/UI:N), and bypassing bonding yields full trusted-peer access (C/I/A:H).

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (android).

CVSS VectorVendor: android

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
CVSS changed
Sep 10, 2026 - 16:22 NVD
9.8 (CRITICAL)
CVE Published
Sep 08, 2026 - 19:17 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 08, 2026 - 19:17 cve.org
CRITICAL 9.8

DescriptionCVE.org

In handleBondStateChanged of AdapterService.java, there is a possible way to skip pairing due to a logic error in the code. This could lead to remote escalation of privilege without user consent with no additional execution privileges needed. User interaction is not needed for exploitation.

Executive ViewAI

Why It Matters

Android devices running versions 15, 16, 16-qpr2, and 17 contain a critical Bluetooth authentication bypass that enables remote privilege escalation without requiring pairing or user interaction. This vulnerability affects hundreds of millions of Android devices across enterprise and consumer deployments, compromising a foundational security boundary designed to prevent unauthorized device control. Organizations must prioritize assessment and contingency planning until a patch becomes available.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include: disabling Bluetooth on non-essential devices, restricting device network access to trusted networks only, implementing mobile device management (MDM) controls to enforce Bluetooth policy and device compliance, and isolating high-value Android devices from sensitive network segments. These controls reduce but do not eliminate risk; patch application is required for full remediation.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Ubiquitous
Android is one of the most widely deployed OS platforms worldwide
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
Very High
Technical Impact
Total

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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