CVE-2021-25369: Samsung Mobile Devices Improper Access Control Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 592 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 1.1%
EPSS score, percentile 64.9 of all scored records
- How severe?
- 6.2 Medium
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline . Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from O(8.x), P(9.0), Q(10.0) to before SMR Mar-2021 Release 1
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: .
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://security.samsungmobile.com/securityUpdate.smsb
- https://nvd.nist.gov/vuln/detail/CVE-2021-25369
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from O(8.x), P(9.0), Q(10.0) to before SMR Mar-2021 Release 1 |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
Samsung mobile devices using Mali GPU contains an improper access control vulnerability in sec_log file. Exploitation of the vulnerability exposes sensitive kernel information to the userspace. This vulnerability was chained with CVE-2021-25337 and CVE-2021-25370.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2021-25369 to its Known Exploited Vulnerabilities (KEV) catalog on 8 Nov 2022.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 29 Nov 2022.
- The CVE record was published on 26 Mar 2021, 592 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 6.2 (Medium), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 1.1% (percentile 64.9), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact partial.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record last updated |
References
More exploited Samsung vulnerabilities
- CVE-2024-7399: Samsung MagicINFO 9 Server Path Traversal Vulnerability
- CVE-2025-21042: Samsung Mobile Devices Out-of-Bounds Write Vulnerability
- CVE-2025-21043: Samsung Mobile Devices Out-of-Bounds Write Vulnerability
- CVE-2025-4632: Samsung MagicINFO 9 Server Path Traversal Vulnerability
- CVE-2022-22265: Samsung Mobile Devices Use-After-Free Vulnerability
- CVE-2021-25371: Samsung Mobile Devices Unspecified Vulnerability