CVE-2025-21043
Samsung Mobile Devices Out-of-Bounds Write Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA notes
https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21043
Description
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation Context
as of October 15, 2026- CISA added CVE-2025-21043 to the KEV catalog 20 days after its CVE record was published. The median for entries added in 2025 is 26 days.
- It is one of 15 Samsung entries in the CISA KEV catalog, and one of 3 added in 2025.
- Its current EPSS score (2.1%) is higher than that of 9% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Samsung Mobile | Samsung Mobile Samsung Mobile Devices | SMR Sep-2025 Release in Android 13, 14, 15, 16 (unaffected) |
References
1 LinksRecord Details
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Samsung Mobile Devices Out-of-Bounds Write Vulnerability
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