CVE-2021-25372: Samsung Mobile Devices Improper Boundary Check Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 825 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 0.8%
EPSS score, percentile 56.6 of all scored records
- How severe?
- 6.1 Medium
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline . Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830 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 or discontinue use of the product if updates are unavailable
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?year=2021&month=3
- https://nvd.nist.gov/vuln/detail/CVE-2021-25372
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830 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 contain an improper boundary check vulnerability within DSP driver that allows for out-of-bounds memory access.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2021-25372 to its Known Exploited Vulnerabilities (KEV) catalog on 29 Jun 2023.
- 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 20 Jul 2023.
- The CVE record was published on 26 Mar 2021, 825 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 6.1 (Medium), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.8% (percentile 56.6), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
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 boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
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