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Vivo Kids Mode CVE-2026-15365

| EUVDEUVD-2026-66295 LOW
Improper Enforcement of Behavioral Workflow (CWE-841)
2026-08-26 Vivo GHSA-7m73-xqjh-9675
2.4
CVSS 4.0 · Vendor: Vivo
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Attack ChainAIDerived

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

  1. Access
    Obtain physical access to Vivo device
  2. Delivery
    Activate Kids Mode session
  3. Exploit
    Navigate to affected feature
  4. Execution
    Trigger flawed pop-up sequence
  5. Persist
    Password verification step bypassed
  6. Impact
    Launch Quick Apps outside Kids Mode sandbox

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Workflow enforcement
Exploitation Conditions

Physical possession of the Vivo device is required (AV:P) - remote exploitation is not possible. Kids Mode must be active and enabled on the device; if the feature is disabled or the device is in normal operation mode, the vulnerability is not exploitable. The attacker must interact with a specific feature's pop-up within the Kids Mode UI to trigger the logic flaw. No privileges are required per CVSS PR:N, but the physical access constraint effectively limits the attacker population to individuals who hold the device. Exploitation is further bounded by the requirement that the target feature be reachable within the Kids Mode session without prior password entry.

Impact

Real-world risk is low in any organizational or enterprise context. The CVSS 4.0 vector AV:P/AC:L/AT:N/PR:N/UI:N confirms physical possession of the device is the hard prerequisite - this is not remotely exploitable. The SC:L/SI:L subsequent-system scores reflect minor impact to Quick Apps reachable through the bypass, not broader device compromise. No EPSS data is available for this CVE. The vulnerability is absent from CISA KEV, and no public proof-of-concept exists. The primary threat model is a supervised child circumventing parental controls rather than a motivated external attacker. The CVSS score of 2.4 accurately reflects the constrained attack surface. There is no data conflict: description, CVSS vector, and CWE are consistent with a local, low-impact logic bypass.

Exploit ScenarioDerived

A child with unsupervised physical access to a Vivo device where Kids Mode is active navigates to the specific affected feature, triggering the flawed pop-up sequence that bypasses the password verification step. Once bypassed, the child gains access to Quick Apps that the parent had intended to restrict through the Kids Mode sandbox boundary. No public proof-of-concept exists at time of analysis.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 26, 2026

Kids Mode on Vivo Android devices contains a pop-up logic flaw that permits physical-access bypass of the parental password gate, enabling a child or any person holding the device to launch Quick Apps outside the Kids Mode sandbox. The CVSS 4.0 score of 2.4 reflects the mandatory physical access requirement and limited low-level confidentiality and integrity impact on both the device and downstream mini-app systems. No public exploit code and no CISA KEV listing exist at time of analysis.

RemediationAI

Consult the Vivo security advisory at https://www.vivo.com/en/support/security-advisory-detail?id=25 for official patch details. No exact fixed version is confirmed from available input data - the patch status is 'Patch available per vendor advisory' without an independently verified release version. As a near-term compensating control, parents can disable Kids Mode entirely and use a third-party parental-control application with a more robust enforcement model; the trade-off is loss of Vivo's integrated app experience. Restricting unsupervised physical access to the device remains the most effective mitigation given AV:P.

Affected VersionsENISA

Kids Mode Versions below 4.9.7.1

Affected Packages

euvd kids_mode_versions_below no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Technical ContextAI · show details

Vivo Kids Mode is a built-in parental-control environment on Vivo Android smartphones that sandboxes device usage to parent-approved, age-appropriate apps. Quick Apps are Vivo's lightweight mini-app runtime - analogous to Android Instant Apps - which are intended to be gated behind the Kids Mode password. CWE-841 (Improper Enforcement of Behavioral Workflow) identifies the root cause: the application's state machine fails to enforce the expected sequence of operations, specifically the mandatory password-verification step before a pop-up within a particular feature transitions the session context out of the Kids Mode boundary. The CPE string cpe:2.3:a:vivo:kids_mode:*:*:*:*:*:*:*:* covers all versions with no upper or lower bound, indicating the affected range has not been narrowed by the vendor in available data.

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Severity by source

Vendor (Vivo) PRIMARY 2.4 LOW
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
vuln.today AI 3.5 LOW

Physical access mandatory (AV:P); no privileges needed (PR:N); scope unchanged as impact is confined to Kids Mode sandbox and Quick Apps (S:U); no availability impact.

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

Primary rating from Vendor (Vivo).

CVSS VectorVendor: Vivo

Attack Vector
Physical
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
Low
Subsequent system: Integrity
Low
Subsequent system: Availability
None

DescriptionCVE.org

A pop-up logic flaw in a certain feature of Kids Mode allows users to bypass password verification and use Quick Apps outside the app.

Threat Intelligence Overview

EPSS Score
0.2%
Top 88% exploitable
Prevalence
Medium
major Android OEM, significant Asia-Pacific market share
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 LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +12
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.

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