What is CVE-2021-25451?

CVE-2021-25451 is a low-severity vulnerability in Google Android, classified under Improper Authentication. CVSS score: 3.3/10. Published 2021-09-09.

How severe is CVE-2021-25451?

Low severity. CVSS v3 base score is 3.3 out of 10.

Auth bypass in Google Android

CVE-2021-25451

A PendingIntent hijacking in NetworkPolicyManagerService prior to SMR Sep-2021 Release 1 allows attackers to get IMSI data.

Vulnerability class: Broken Authentication

Published 2021-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Android — versions 9.0, 10.0, 11.0
Samsung Mobile Devices — versions P(9.0), Q(10.0), R(11.0)

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25451?: CVE-2021-25451 is a low-severity vulnerability in Google Android, classified under Improper Authentication. CVSS score: 3.3/10. Published 2021-09-09.
How severe is CVE-2021-25451?: Low severity. CVSS v3 base score is 3.3 out of 10.