CVE-2021-0428

In getSimSerialNumber of TelephonyManager.java, there is a possible way to read a trackable...

5.5 MediumFix available

In getSimSerialNumber of TelephonyManager.java, there is a possible way to read a trackable identifier due to a missing permission check. This could lead to local information disclosure with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-173421434

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.12%Down 0.3 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

Record: CVE-2021-0428
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-862
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-0428
Updated: 2026-11-02

EUVDEUVD-2021-3047 No score

Record: EUVD-2021-3047
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5p76-82qh-5gp5 5.5

In getSimSerialNumber of TelephonyManager.java, there is a possible way to read a trackable...

Record: GHSA-5p76-82qh-5gp5
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-276
Updated: 2026-11-02

OSVASB-A-173421434 No score

Record: ASB-A-173421434
Updated: 2026-11-05

Affected products

google android

Affected packages

Affected packages
Package	Affected	Fixed
`platform/frameworks/base` Android	10:0 up to 10:2021-09-01, plus listed versions 10	10:2021-09-01
`platform/frameworks/opt/telephony` Android	10:0 up to 10:2021-09-01, plus listed versions 10	10:2021-09-01
`platform/packages/providers/ContactsProvider` Android	10:0 up to 10:2021-09-01, plus listed versions 10	10:2021-09-01

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-2021-0428 is a medium vulnerability (CVSS 5.5) in Google Android, published April 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. Fixed in platform/frameworks/base 10:2021-09-01.

References

Show 7 moreShow less