CVE-2021-25337
HighExploitedPublic exploitImproper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.
Published Mar 4, 2021 · Updated Oct 30, 2025
Key Facts
Patch immediately- CVE-2021-25337 is a high-severity vulnerability (CVSS 7.1 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 Nov 3, 2020. Public exploit code is available.
- EPSS estimates a 2.8% 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
7.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS (30-day exploit likelihood)
2.8%
Higher than 86.2% 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-2021-25337 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 8, 2022 | Nov 29, 2022 | Not reported |
| Industry KEV feed | Nov 3, 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
49 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 | >= Selected P(9.0), Q(10.0), R(11.0) | SMR Mar-2021 Release 1 |
Patched Releases
Samsung Mobile Devices
SMR Mar-2021 Release 1
Timeline
Added to Industry KEV feed
Nov 3, 2020
Publicly disclosed
Mar 4, 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-269 Improper Privilege Management
References
FAQ
Common Questions.
Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.
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 >= Selected P(9.0), Q(10.0), R(11.0). 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 Nov 3, 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.
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