CVE-2021-0446

Local privilege escalation via vCard import tapjacking

Published Apr 13, 2021 · Updated Aug 3, 2024

Privilege escalation in Google Cloud Android 11 allows local users to bypass vCard import consent through a malicious screen overlay. ImportVCardActivity and SelectAccountActivity leave non-system overlay windows visible during the consent flow instead of hiding them. Exploitation requires User-level code execution and interaction with the overlaid import flow, resulting in consent bypass and local privilege escalation.

CVSS severity7.3
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Google Cloud Android 11 allows local users to bypass vCard import consent through a malicious screen overlay. ImportVCardActivity and SelectAccountActivity leave non-system overlay windows visible during the consent flow instead of hiding them. Exploitation requires User-level code execution and interaction with the overlaid import flow, resulting in consent bypass and local privilege escalation.

The record

CVE
CVE-2021-0446
Published
Apr 13, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-269
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android-11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-11

Published CVSS scores

4.4NIST NVDAV:L/AC:M/Au:N/C:P/I:P/A:P
7.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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