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Android Bootloader CVE-2026-0192

| EUVDEUVD-2026-79154 MEDIUM
Missing Authorization (CWE-862)
2026-09-15 Google_Devices GHSA-56cq-w5m4-v4hj
6.7
CVSS 3.1 · Vendor: Google_Devices
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Attack ChainAIDerived

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

  1. Access
    Gain System-privileged execution on device
  2. Exploit
    Invoke bootloader interface lacking permission check
  3. Execution
    Bypass missing authorization gate
  4. Impact
    Escalate privileges / tamper boot-level state

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

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 attacker to already possess Android System execution privileges (PR:H) and local access to the device (AV:L); it targets a bootloader operation that is missing a required permission check (CWE-862). No user interaction is required (UI:N). The critical limiting factor is the System-privilege prerequisite - this is not reachable by an ordinary unprivileged app or remotely, so it functions as a second-stage escalation from an already-privileged foothold rather than an initial-access vector.

Impact

This is a genuine-but-modest local privilege escalation, not a high-priority emergency. The CVSS 3.1 vector (AV:L/AC:L/PR:H/UI:N/S:U) shows local access with HIGH privileges already required - the description confirms this: exploitation needs 'System execution privileges.' That means the attacker must already be running as the highly-privileged Android System user before they can leverage this missing bootloader permission check; the actual privilege gain over an already-System attacker is therefore limited, which makes the C:H/I:H/A:H triad look generous relative to the 6.7 base score. Exploitation signals reinforce low urgency: EPSS is 0.11% (2nd percentile), there is no CISA KEV listing and no public exploit code. No SSVC decision data is provided. The one meaningful counterweight is that bootloader-level flaws can matter for verified-boot/secure-boot integrity, so the impact ceiling is real even if the access prerequisite is steep. Net: a legitimate patch-in-cycle bootloader hardening fix, not a widely-exploitable threat.

Exploit ScenarioDerived

A local process or component already operating with Android System execution privileges invokes a bootloader interface that fails to enforce a required permission check, allowing it to perform a privileged operation it should not be authorized for. No user interaction is required. No public proof-of-concept or exploit code is identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

Local privilege escalation in the Android bootloader lets a caller that already holds System execution privileges bypass a missing permission check and reach higher-privileged bootloader operations on affected Android devices. The CVSS vector (AV:L/PR:H/UI:N) makes clear this is a second-stage escalation that requires both local access and an existing high-privileged foothold, not a remote or unprivileged-app vector, and it needs no user interaction. Google resolves it through the September 2026 Android/Pixel security bulletin; EPSS is very low (0.11%, 2nd percentile) and no public exploit has been identified at time of analysis.

RemediationAI

Install the September 2026 Android/Pixel security update (patch level 2026-09-01) from https://source.android.com/docs/security/bulletin/pixel/2026/2026-09-01; that bulletin is the vendor-released fix and is the only remediation credited in the provided references, and no standalone fix version number is given in the input data. Because exploitation requires System execution privileges plus local access, the highest-value compensating controls focus on preventing a System-level foothold in the first place: keep verified boot and a locked bootloader with OEM unlocking disabled (this blocks flashing modified boot images, at the cost of losing developer/unlock capability), maintain a strict OS/security patch cadence to remove the chained first-stage vulnerabilities that would grant System privileges, and restrict adb/USB debugging and debug-capable builds to controlled environments (which reduces local attack surface but hampers developer workflows). Treating System-level compromise on an unpatched device as equivalent to bootloader-level compromise is the correct risk assumption until the 2026-09-01 firmware can be applied.

Affected VersionsENISA

Android Android kernel

Affects your stack

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

Technical ContextAI · show details

The root cause is CWE-862 (Missing Authorization): a bootloader operation is invoked without the permission check that should gate it, so a process already running with System execution privileges is not stopped from performing an action intended for higher trust. The affected surface is the bootloader/firmware layer of Android, tracked by CPE cpe:2.3:a:google:android:*:*:*:*:*:*:*:* (i.e., version-agnostic across Android builds) and characterized by EUVD as affecting the Android kernel. Score 6.7 with S:U/C:H/I:H/A:H reflects high confidentiality and integrity impact but a scope-unchanged, local-only attack path - the PR:H prerequisite is the dominant limiter, meaning the flaw is only reachable from an already-compromised privileged context rather than from ordinary application code or over the network.

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Severity by source

Vendor (Google_Devices) PRIMARY 6.7 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 6.7 MEDIUM

Local access with pre-existing System privileges (PR:H, AV:L) and no interaction; bootloader authorization bypass plausibly yields full C/I/A impact, matching the vendor 6.7.

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

Primary rating from Vendor (Google_Devices).

CVSS VectorVendor: Google_Devices

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

Lifecycle Timeline

3
CVSS changed
Sep 16, 2026 - 17:22 NVD
6.7 (MEDIUM)
CVE Published
Sep 15, 2026 - 18:33 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 15, 2026 - 18:33 cve.org
MEDIUM 6.7

DescriptionCVE.org

In Bootloader, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Threat Intelligence Overview

EPSS Score
0.1%
Top 98% exploitable
Prevalence
High
Android/Pixel bootloader component; huge device base but Pixel-bulletin-scoped
Data Quality
4 sources
Confidence: Medium

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
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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