CVE-2021-25369
MediumExploitedPublic exploitAn improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace.
Published Mar 26, 2021 · Updated Oct 30, 2025
Key Facts
Patch immediately- CVE-2021-25369 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Android (Samsung), Samsung Mobile Devices.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 10, 2020. Public exploit code is available.
- EPSS estimates a 1.1% probability of exploitation in the next 30 days.
- Fixed versions are available, including Samsung Mobile Devices SMR Mar-2021 Release 1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
1.1%
Higher than 64.4% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-25369 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 8, 2022 | Nov 29, 2022 | Not reported |
| Industry KEV feed | Dec 10, 2020 | Nov 29, 2022 | Not reported |
| CIRCL KEV | Nov 8, 2022 | Nov 29, 2022 | Not reported |
| ENISA EUVD | Nov 8, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
48 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AndroidSamsung | 10.0-smr-apr-2020-r1, 10.0-smr-aug-2020-r1, 10.0-smr-dec-2019-r1, 10.0-smr-dec-2020-r1, 10.0-smr-feb-2020-r1, 10.0-smr-feb-2021-r1, 10.0-smr-jan-2020-r1, 10.0-smr-jan-2021-r1 | n/a |
| Samsung Mobile Devices | >= O(8.x), P(9.0), Q(10.0) | SMR Mar-2021 Release 1 |
Patched Releases
Samsung Mobile Devices
SMR Mar-2021 Release 1
Timeline
Added to Industry KEV feed
Dec 10, 2020
Publicly disclosed
Mar 26, 2021
Added to CISA KEV
Nov 8, 2022
Added to CIRCL KEV
Nov 8, 2022
Added to ENISA EUVD
Nov 8, 2022
Last updated
Oct 30, 2025
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
- advisoryhttps://security.samsungmobile.com
- advisoryhttps://security.samsungmobile.com/securityUpdate.smsb
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace.
Affected: Android (Samsung) versions 10.0-smr-apr-2020-r1, 10.0-smr-aug-2020-r1, 10.0-smr-dec-2019-r1, 10.0-smr-dec-2020-r1, 10.0-smr-feb-2020-r1, 10.0-smr-feb-2021-r1, 10.0-smr-jan-2020-r1, 10.0-smr-jan-2021-r1; Samsung Mobile Devices versions >= O(8.x), P(9.0), Q(10.0). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 10, 2020.
Yes. It was added on Nov 8, 2022 with a federal remediation due date of Nov 29, 2022.
Public exploit code is available.
Fixed versions are available, including Samsung Mobile Devices SMR Mar-2021 Release 1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2021-25369 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo