Security tracker
CVE-2025-21042: Samsung Mobile Devices Out-of-Bounds Write Vulnerability
In short
Samsung Mobile Devices has a weakness classified as out-of-bounds write (CWE-787). CISA added it to its Known Exploited Vulnerabilities catalog on 2025-11-10. NVD lists CVSS 3.1 at 9.8 CRITICAL.
What it is
“Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so. This vulnerability could allow remote attackers to execute arbitrary code.” — CISA KEV, retrieved 2026-11-01
“Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.” — NVD, retrieved 2026-11-01
Who is affected
Samsung Mobile Devices. NVD lists the following versions as affected:
- Versions version 13.0
- Versions version 14.0
- Versions version 15.0
Exploitation status
CISA KEV added: 2025-11-10. Known ransomware campaign use: Not reported by CISA. Due date CISA set for US federal civilian agencies: 2025-12-01.
Scores
NVD CVSS 3.1: 9.8 CRITICAL; vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source [email protected].
EPSS by FIRST: 35.58%; percentile 98.46; score date 2026-10-31. EPSS estimates the probability of exploitation in the next 30 days.
CWE: CWE-787.
Timeline
| Date | Event |
|---|---|
| 2025-09-12T08:15:44.743 | NVD published |
| 2025-11-10 | CISA KEV added |
| 2025-12-01 | CISA KEV due |
| 2026-10-08T10:35:13.083 | NVD last modified |
| 2026-10-31 | FIRST EPSS score |
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.” — CISA KEV
What to do
- Confirm whether you run Samsung Mobile Devices and which version.
- Apply the vendor update or mitigation in the advisory.
- Follow CISA’s required action.
- Review the vendor guidance on signs of compromise.
- Track the fix through completion.
Sources and dates
CISA Known Exploited Vulnerabilities Catalog, version 2026.10.30; retrieved 2026-11-01. CISA KEV data: CC0 1.0. No endorsement by CISA.
NVD retrieved: 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS scores by FIRST; score date 2026-10-31.
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