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Google Android CVE-2026-58885

| EUVDEUVD-2026-115608 HIGH
Unintended Proxy or Intermediary ('Confused Deputy') (CWE-441)
2026-11-02 google_android GHSA-4hrg-57vv-cg9w
8.4
CVSS 3.1 · Vendor: google_android
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Attack ChainAIDerived

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

  1. Access
    Install malicious low-privilege app
  2. Delivery
    Invoke privileged system component
  3. Exploit
    Trigger confused-deputy permission bypass
  4. Execution
    Execute action with elevated privileges
  5. Impact
    Full local privilege escalation

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service Proxy/intermediary controls
Exploitation Conditions

Exploitation requires a local attacker presence on the device - in practice an already-installed malicious or compromised application running on Android 17 - which then invokes a privileged system component that fails to validate the caller's permissions (the confused deputy). No user interaction is required (UI:N) and no additional execution privileges are needed beyond initial app installation. Limiting factors: the attack is strictly local (AV:L), so there is no remote network exploitation path; an attacker must first get code running on the device, and the flaw affects Android 17 specifically. The precise vulnerable components ('multiple locations') and the exact trigger conditions are not described in the available sources.

Impact

Signals are moderately consistent and point to a serious-but-not-emergency local flaw. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, base 8.4) describes a locally-exploitable confused-deputy (CWE-441) that yields total compromise of the affected component without user interaction, which aligns with the SSVC Technical Impact of 'total'. However, the risk signals that drive urgency are low: SSVC reports Exploitation 'none' and Automatable 'no', no CISA KEV listing is present, and no EPSS probability was supplied in the input - so there is no evidence of active or scalable exploitation. The vuln.today Decision label is 'this_week', consistent with a high-impact local privilege escalation that warrants prompt patching but is not flagged act_now or emergency. Note a tension worth flagging: the vector sets PR:N, yet real-world exploitation of an Android confused-deputy escalation typically requires a malicious or compromised app already present on the device (local attacker position via AV:L) - PR:N reflects that the vulnerable privileged component grants access without the attacker holding those privileges, not that the device is remotely reachable. No EPSS score and no public exploit reference are present in the data, so widespread-exploitation likelihood cannot be quantified from these sources.

Exploit ScenarioDerived

A malicious or compromised low-privilege app installed on an Android 17 device abuses a privileged system component that performs an action on the app's behalf without correctly checking the caller's permissions (confused deputy). Because no user interaction and no additional execution privileges are required, the app silently escalates to the privileges of the deputy component, gaining high confidentiality, integrity, and availability impact on the device. No public exploit identified at time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Nov 02, 2026

Local privilege escalation in Android 17 allows an app already installed on the device to bypass permission checks and gain elevated access by invoking a privileged system component that fails to validate the caller's identity. The CVSS 8.4 score reflects high confidentiality, integrity and availability impact with no user interaction required, but the attack surface is strictly local - an attacker must first get code running on the device, and no network path exists. Exploitation is not confirmed: no public exploit code or KEV listing was identified at time of analysis, CISA SSVC records exploitation as 'none' and automatable as 'no', while technical impact is rated total; no EPSS score was supplied in the source data.

RemediationAI

No exact fixed build number is given in the available data; remediation is keyed to the Android Security Bulletin dated 2026-11-01 (https://source.android.com/docs/security/bulletin/2026/2026-11-01), which is where the vendor publishes the patched builds and the associated security patch level for Android 17 - apply that bulletin's patch level or later. Because exploitation requires a malicious or compromised app already resident on the device, the practical exposure window is governed by what can be installed: restricting sideloading, enforcing Google Play Protect verification and keeping the installed application inventory tight reduces the chance an attacker obtains the initial local foothold, though none of these substitutes for the platform update. No workaround short of the vendor patch is identified in the supplied sources, and the flaw is not remotely reachable, so perimeter network controls have no bearing on it.

Affected VersionsENISA

Android 17

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Technical ContextAI · show details

The root cause class is CWE-441, Confused Deputy: a component that holds a privilege the caller does not possess performs an action on the caller's behalf without verifying that the caller is entitled to it. In Android's architecture this pattern lives at the Binder IPC boundary, where ordinary sandboxed applications send transactions to privileged system services (frequently in system_server) that enforce signature- or system-level permissions before carrying out sensitive operations. The description states the bypass exists 'in multiple locations', so more than one privileged entry point is believed to be affected, but the specific services, permission strings and exact trigger conditions are not described in the available sources. The CVSS vector AV:L/AC:L/PR:N/UI:N indicates a local attack that needs no prior privileges and no user interaction, which describes severity and preconditions rather than the mechanism itself. EUVD scopes affected versions to Android 17, and the sole reference is the Android Security Bulletin of 2026-11-01.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (google_android) PRIMARY 8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.4 HIGH

Local confused-deputy escalation (AV:L) needing a malicious app but no extra privileges (PR:N) or interaction (UI:N); total device impact gives C/I/A:H.

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

Primary rating from Vendor (google_android).

CVSS VectorVendor: google_android

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

Lifecycle Timeline

3
CVSS changed
Nov 02, 2026 - 21:22 NVD
8.4 (HIGH)
CVE Published
Nov 02, 2026 - 19:54 cve.org
HIGH 8.4
CVE Published
Nov 02, 2026 - 19:54 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

In multiple locations, there is a possible permission bypass due to a confused deputy. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Executive ViewAI

Why It Matters

A high-severity local privilege escalation vulnerability (CVE-2026-58885) in Android 17 could allow a malicious app already installed on a device to bypass permission checks and gain elevated system access. This poses a significant risk to our mobile fleet, as a single compromised or user-installed app could lead to full device compromise, exposing sensitive corporate data and undermining device integrity. Leadership should prioritize patching and interim controls to protect organizational assets and maintain regulatory compliance.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include enforcing app allowlisting, disabling sideloading, restricting privileged system component access via MDM policies, and deploying mobile threat defense to detect exploitation attempts.

Threat Intelligence Overview

EPSS Score
0.1%
Top 99% exploitable
Prevalence
Ubiquitous
Android is one of the most deployed OSes worldwide; version 17 adoption still ramping
Data Quality
5 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 HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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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