# CVE-2025-21043: Samsung Mobile Devices Out-of-Bounds Write Vulnerability

> CVE-2025-21043: Samsung Mobile Devices Out-of-Bounds Write Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-21043
Last updated: 2026-10-08T12:54:41Z

- Published: 2025-09-12 07:21 UTC · Updated: 2026-10-08 12:54 UTC · Assigner: SamsungMobile
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 2.2%, 83th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-10-02, federal due date 2025-10-23, ransomware use: Unknown

## Description

Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.

## CISA 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.

## Affected vendors and products

- Samsung Mobile: Samsung Mobile Devices

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-21043)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-21043)
- [https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09](https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-21043 · Markdown: https://rewindex.com/cve/CVE-2025-21043.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-21043 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:24.499Z