CVE-2021-25395

Exp

A race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows local attackers to bypass signature check given a radio privilege is compromised.

Published: 2021-06-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25395 is rated Active Exploitation (70/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.39%). CISA KEV confirms active exploitation (added 2023-06-29) affecting Samsung / Mobile Devices. a weakness (CWE-362) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2021-25395

Name: Samsung Mobile Devices Race Condition Vulnerability · CISA KEV detail

Exploit added: 2023-06-29

Action due: 2023-07-20

Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

Exploit prediction scoring system (EPSS) score for CVE-2021-25395

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 0.39% +0.21%
2 2025-11-21 1.69% 0.17% -1.52%
3 2025-11-18 — 1.69% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25395

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.4 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.5 5.9 [email protected]
6.4 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.5 5.9 [email protected]
4.4 2.0 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.4 6.4 [email protected]

Weakness enumeration for CVE-2021-25395

Affected software / configurations for CVE-2021-25395

Vendor Product Version Raw CPE
samsung android 8.1 cpe:2.3:o:samsung:android:8.1:-:*:*:*:*:*:*
samsung android 9.0 cpe:2.3:o:samsung:android:9.0:smr-apr-2021-r1:*:*:*:*:*:*
samsung android 9.0 cpe:2.3:o:samsung:android:9.0:smr-feb-2021-r1:*:*:*:*:*:*
samsung android 9.0 cpe:2.3:o:samsung:android:9.0:smr-jan-2021-r1:*:*:*:*:*:*
samsung android 9.0 cpe:2.3:o:samsung:android:9.0:smr-mar-2021-r1:*:*:*:*:*:*
samsung android 10.0 cpe:2.3:o:samsung:android:10.0:smr-apr-2021-r1:*:*:*:*:*:*
samsung android 10.0 cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*
samsung android 10.0 cpe:2.3:o:samsung:android:10.0:smr-jan-2021-r1:*:*:*:*:*:*
samsung android 11.0 cpe:2.3:o:samsung:android:11.0:smr-apr-2021-r1:*:*:*:*:*:*
samsung android 11.0 cpe:2.3:o:samsung:android:11.0:smr-feb-2021-r1:*:*:*:*:*:*
samsung android 11.0 cpe:2.3:o:samsung:android:11.0:smr-jan-2021-r1:*:*:*:*:*:*
samsung android 11.0 cpe:2.3:o:samsung:android:11.0:smr-jul-2021-r1:*:*:*:*:*:*

References for CVE-2021-25395

cvelogic Threat Intelligence