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Google Android EUVDEUVD-2026-115575

| CVE-2026-55287 HIGH
User Interface (UI) Misrepresentation of Critical Information (CWE-451)
2026-11-02 google_android GHSA-8cj5-xw53-7gp8
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 unprivileged local app
  2. Exploit
    Invoke credential-grant activity with misleading UI
  3. Execution
    User grants account credentials
  4. Impact
    Escalate privileges locally

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V3 - Web Frontend Security UI security representation
Exploitation Conditions

Requires local presence on the device: the attacker must be able to run code as an installed application and reach GrantCredentialsPermissionActivity, the AOSP component that brokers one app's access to another app's stored account credentials. Exploitation depends on the misleading or insufficient UI of that grant dialog to obtain the credential grant; the precise trigger is not described in the available sources. Limiting factors: the vector is local (AV:L), not remote or network-reachable, so an attacker needs app-level foothold on the device first; SSVC marks it not automatable. The description's claim that user interaction is not needed conflicts with the CVSS UI:N vs. the 'trick the user' mechanism, so whether a victim tap on the grant dialog is actually required is unverified and should be confirmed against the Android bulletin.

Impact

This is a local privilege-escalation flaw (CVSS:3.1 AV:L/AC:L/PR:N/UI:N, base 8.4) in Android's GrantCredentialsPermissionActivity, rated CWE-451 (UI misrepresentation). The signals are mixed and should temper urgency. On severity: the vendor assigns total technical impact (C:H/I:H/A:H), consistent with an unprivileged local app obtaining account credentials. On likelihood: SSVC reports Exploitation=none and Automatable=no, no CISA KEV entry is present, no EPSS score was supplied, and no public exploit or PoC reference appears in the input - so there is no public exploit identified at time of analysis. The vuln.today decision label is 'this_week', i.e. prioritized but not an emergency, which aligns with a high-impact-but-not-yet-exploited local bug. One internal conflict must be flagged for verification: the CVSS vector states UI:N (no user interaction) while the description says the attack works by tricking 'the user into granting account credentials due to misleading or insufficient UI' - a social-engineering mechanism that normally implies user interaction. These two statements cannot both be literally true; verify the intended user-interaction requirement with the Android bulletin, because it materially changes the realistic difficulty. Net: a genuine local EoP worth patching on the normal monthly cadence, not a drop-everything issue absent any exploitation evidence.

Exploit ScenarioDerived

A user installs a malicious or low-privilege app from an untrusted source. The app induces Android to present the credential-grant dialog in a misleading way so the victim (or the system flow) grants it access to another app's account credentials, yielding escalation on the device. No public exploit or PoC was identified in the available data, and the exact trigger is not described in the sources beyond 'misleading or insufficient UI'.

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's GrantCredentialsPermissionActivity allows an installed application to obtain account credentials it should not be granted, by presenting a misleading or insufficiently informative permission dialog to the user. Affected platforms are Android 14, 15, 16, 16-qpr2 and 17 according to EUVD version data, with the vendor bulletin covering the Android Open Source Project component. The vector is local (AV:L) with no privileges required and high confidentiality, integrity and availability impact, rated 8.4; no public exploit has been identified at time of analysis and SSVC marks the flaw as not automatable, so the practical barrier is first obtaining app-level code execution on the device.

RemediationAI

Apply the Android Security Bulletin for November 2026 (https://source.android.com/docs/security/bulletin/2026/2026-11-01) and move devices to the build with the 2026-11-01 security patch level or later for the applicable Android 14, 15, 16, 16-qpr2 and 17 branches; the bulletin is the reference for the exact patched builds, so patch status is best described as patch available per vendor advisory rather than a single fixed version. The evidence provides no documented feature toggle or configuration workaround for the GrantCredentialsPermissionActivity dialog, and the practical exposure reduction available from the data is to limit which applications can run on the device at all, since the vector is local (AV:L) and requires an attacker to already hold app-level execution on the device to reach the activity; this is a deployment restriction rather than a fix and does not remove the underlying UI misrepresentation. The vendor-mediated credential grant flow should be treated as untrusted for account access until the bulletin update is installed.

Affected VersionsENISA

Android 16
Android 15
Android 16-qpr2
Android 14
Android 17

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Technical ContextAI · show details

The flaw is classified as CWE-451, misrepresentation of critical information in a user interface, and lives in GrantCredentialsPermissionActivity, the AOSP activity that mediates a user's decision to let one application access another application's stored account credentials through Android's AccountManager framework. Because the grant dialog is the security decision point, a dialog whose wording, layout or displayed identity information is misleading lets an attacker steer the victim toward approving a credential grant that they did not intend to make, and the resulting access is high-impact across confidentiality, integrity and availability. The assessed vector is CVSS:3.1 AV:L/AC:L/PR:N/UI:R, i.e. the attacker needs a local presence as an installed app and the exploitation path runs through the grant UI rather than through network reachability; EUVD and the description reference user interaction as unnecessary, which conflicts with the UI:R assessment and with the 'trick the user' mechanism, so whether a victim tap on the dialog is actually required remains unverified. Exploitation depends on the attacker reaching the activity, and SSVC records Exploitation: none and Automatable: no.

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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 7.8 HIGH

Local app vector (AV:L) with no privileges (PR:N); CWE-451 'trick the user into granting' implies UI:R despite the vendor's UI:N; impact total (C/I/A:H).

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/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 (None) 8.4 (HIGH)
CVE Published
Nov 02, 2026 - 19:53 cve.org
HIGH 8.4
CVE Published
Nov 02, 2026 - 19:53 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

In onCreate of GrantCredentialsPermissionActivity.java, there is a possible way to trick the user into granting account credentials due to misleading or insufficient UI. 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 flaw in Android's credential permission handling (CVE-2026-55287) could allow a malicious installed app on versions 14 through 17 to trick users into granting access to account credentials. Because the attack requires prior app installation and user interaction, risk to the organization is concentrated in mobile endpoints that access corporate accounts, where a successful exploit could expose sensitive data and erode trust in mobile security controls.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict app installations to trusted/approved sources via MDM policies, deploy mobile threat defense to detect malicious apps, educate users on permission dialog scrutiny, and monitor for suspicious credential access on Android devices.

Threat Intelligence Overview

EPSS Score
0.1%
Top 99% exploitable
Prevalence
Ubiquitous
Core AOSP account framework present on virtually all Android devices
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
Medium
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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