CVE-2021-39796

In HarmfulAppWarningActivity of HarmfulAppWarningActivity.java, there is a possible way to trick...

7.3 HighFix available

In HarmfulAppWarningActivity of HarmfulAppWarningActivity.java, there is a possible way to trick victim to install harmful app due to a tapjacking/overlay attack. This could lead to local escalation of privilege with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12LAndroid ID: A-205595291

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.17%Down 2.4 points since Apr 13, 2022

What each source reports

NVD Score used 7.3

Record: CVE-2021-39796
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.9 MediumAV:L/AC:M/Au:N/C:C/I:C/A:C
Weakness: CWE-1021
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-39796
Updated: 2026-11-02

EUVDEUVD-2021-26153 No score

Record: EUVD-2021-26153
Updated: 2026-11-03

GitHub AdvisoriesGHSA-2527-g53r-vw26 7.3

In HarmfulAppWarningActivity of HarmfulAppWarningActivity.java, there is a possible way to trick...

Record: GHSA-2527-g53r-vw26
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-1021
Updated: 2026-11-02

OSV 7.3

Record: CVE-2021-39796
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-39796 7.3

Record: DEBIAN-CVE-2021-39796
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-39796 7.3

Record: UBUNTU-CVE-2021-39796
CVSS 3.1: 7.3 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVASB-A-205595291 No score

Record: ASB-A-205595291
Updated: 2026-11-05

Affected products

google android

Affected packages

Affected packages
Package	Affected	Fixed
`platform/frameworks/base` Android	10:0 up to 10:2022-04-01, plus listed versions 10	10:2022-04-01
`platform/frameworks/base` Android	11:0 up to 11:2022-04-01, plus listed versions 11	11:2022-04-01
`platform/frameworks/base` Android	12:0 up to 12:2022-04-01, plus listed versions 12	12:2022-04-01
`platform/frameworks/base` Android	12L:0 up to 12L:2022-04-01, plus listed versions 12L	12L:2022-04-01
`android-platform-frameworks-base` Debian:12	All versions, plus listed versions 1:10.0.0+r36-101:13.0.0+r30-11:13.0.0+r30-1~exp11:13.0.0+r30-1~exp21:13.0.0+r30-1~exp3 Show 12 moreShow less 1:13.0.0+r30-1~exp41:13.0.0+r66-11:13.0.0+r66-1~exp11:13~beta3-1~exp11:14~beta1-11:14~beta1-1~exp21:14~beta1-1~exp~11:14~beta1-21:14~beta1-31:14~beta1-41:14~beta1-4~exp11:14~beta1-5	None known
`android-platform-frameworks-base` Debian:13	All versions, plus listed versions 1:14~beta1-31:14~beta1-41:14~beta1-4~exp11:14~beta1-5	None known
`android-platform-frameworks-base` Debian:14	All versions, plus listed versions 1:14~beta1-31:14~beta1-41:14~beta1-4~exp11:14~beta1-5	None known
`android-platform-frameworks-base` Ubuntu:16.04:LTS	All versions, plus listed versions 21-221-2.11:6.0.0+r26-31:6.0.1+r16-1	None known
`android-platform-frameworks-base` Ubuntu:18.04:LTS	All versions, plus listed versions 1:7.0.0+r33-11:8.1.0+r23-3~18.04	None known
`android-platform-frameworks-base` Ubuntu:20.04:LTS	All versions, plus listed versions 1:8.1.0+r23-3build11:8.1.0+r23-3build2	None known
`android-platform-frameworks-base` Ubuntu:22.04:LTS	All versions, plus listed versions 1:10.0.0+r36-3	None known
`android-platform-frameworks-base` Ubuntu:24.04:LTS	All versions, plus listed versions 1:13.0.0+r66-11:14~beta1-2build21:14~beta1-2build3	None known

History

History
Recorded	Changed	Sources
Nov 5, 2026	facts	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-39796 is a high vulnerability (CVSS 7.3) in Google Android, published April 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. Fixed in platform/frameworks/base 10:2022-04-01.