SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2026-28640

In checkCallerIsCertInstallerOrSelfInProfile of CredentialStorageActivity.java, there is a possible permission bypass due to improper input validation.

HIGH 7.8EPSS 0.07%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.07%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

In checkCallerIsCertInstallerOrSelfInProfile of CredentialStorageActivity.java, there is a possible permission bypass due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS 3.1
7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
0.07% probability · 0th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-20
Affected
google/android
Source
security@android.com
EPSS trend
0%3%5%6 October 2026: 0.12%26 October 2026: 0.07%6 October 202626 October 2026

EPSS moved from 0.1% on 6 October 2026 to 0.1% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.