9.8

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

CVSS: 9.8v3.1CriticalKEVAnalyzed
Published 12-09-2025Last modified 07-10-2026
Open JSON

Vulnerability summary

CVE-2025-21043 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in Samsung Mobile Devices. It is known to be exploited: CISA lists it, first on 02-10-2025. EPSS estimates a 2.14% chance of exploitation in the next 30 days, higher than 81.7% of scored vulnerabilities.

Overall risk
85/100
0100
Critical · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.14%
0%100%
Low · +0.23 pp in 30 days
KEVListedCISA
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-09-2025
    PublishedVulnerability first disclosed.
  2. 02-10-2025
    Added to CISA KEVSamsung Mobile Devices Out-of-Bounds Write Vulnerability
  3. 23-10-2025
    CISA remediation dueApply mitigations per vendor instructions.
  4. 07-10-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

2.14%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

+0.23 pp

From 1.91% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.14%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
02-10-2025
Federal due date
23-10-2025

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. security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09 nvd.nist.gov/vuln/detail/CVE-2025-21043

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Samsung1 product
  • android13.0 | 13.0:smr-apr-2022-r1 | 13.0:smr-apr-2023-r1 | 13.0:smr-apr-2024-r1 | 13.0:smr-apr-2025-r1 | 13.0:smr-aug-2022-r1 | 13.0:smr-aug-2023-r1 | 13.0:smr-aug-2024-r1 | 13.0:smr-aug-2025-r1 | 13.0:smr-dec-2021-r1 | 13.0:smr-dec-2022-r1 | 13.0:smr-dec-2023-r1 | 13.0:smr-dec-2024-r1 | 13.0:smr-feb-2022-r1 | 13.0:smr-feb-2023-r1 | 13.0:smr-feb-2024-r1 | 13.0:smr-feb-2025-r1 | 13.0:smr-jan-2022-r1 | 13.0:smr-jan-2023-r1 | 13.0:smr-jan-2024-r1 | 13.0:smr-jan-2025-r1 | 13.0:smr-jul-2022-r1 | 13.0:smr-jul-2023-r1 | 13.0:smr-jul-2024-r1 | 13.0:smr-jul-2025-r1 | 13.0:smr-jun-2022-r1 | 13.0:smr-jun-2023-r1 | 13.0:smr-jun-2024-r1 | 13.0:smr-jun-2025-r1 | 13.0:smr-mar-2022-r1 | 13.0:smr-mar-2023-r1 | 13.0:smr-mar-2024-r1 | 13.0:smr-mar-2025-r1 | 13.0:smr-may-2022-r1 | 13.0:smr-may-2023-r1 | 13.0:smr-may-2024-r1 | 13.0:smr-may-2025-r1 | 13.0:smr-nov-2021-r1 | 13.0:smr-nov-2022-r1 | 13.0:smr-nov-2023-r1 | 13.0:smr-nov-2024-r1 | 13.0:smr-oct-2022-r1 | 13.0:smr-oct-2023-r1 | 13.0:smr-oct-2024-r1 | 13.0:smr-sep-2022-r1 | 13.0:smr-sep-2023-r1 | 13.0:smr-sep-2024-r1 | 14.0 | 14.0:smr-apr-2022-r1 | 14.0:smr-apr-2023-r1 | 14.0:smr-apr-2024-r1 | 14.0:smr-apr-2025-r1 | 14.0:smr-aug-2022-r1 | 14.0:smr-aug-2023-r1 | 14.0:smr-aug-2024-r1 | 14.0:smr-aug-2025-r1 | 14.0:smr-dec-2021-r1 | 14.0:smr-dec-2022-r1 | 14.0:smr-dec-2023-r1 | 14.0:smr-dec-2024-r1 | 14.0:smr-feb-2022-r1 | 14.0:smr-feb-2023-r1 | 14.0:smr-feb-2024-r1 | 14.0:smr-feb-2025-r1 | 14.0:smr-jan-2022-r1 | 14.0:smr-jan-2023-r1 | 14.0:smr-jan-2024-r1 | 14.0:smr-jan-2025-r1 | 14.0:smr-jul-2022-r1 | 14.0:smr-jul-2023-r1 | 14.0:smr-jul-2024-r1 | 14.0:smr-jul-2025-r1 | 14.0:smr-jun-2022-r1 | 14.0:smr-jun-2023-r1 | 14.0:smr-jun-2024-r1 | 14.0:smr-jun-2025-r1 | 14.0:smr-mar-2022-r1 | 14.0:smr-mar-2023-r1 | 14.0:smr-mar-2024-r1 | 14.0:smr-mar-2025-r1 | 14.0:smr-may-2022-r1 | 14.0:smr-may-2023-r1 | 14.0:smr-may-2024-r1 | 14.0:smr-may-2025-r1 | 14.0:smr-nov-2021-r1 | 14.0:smr-nov-2022-r1 | 14.0:smr-nov-2023-r1 | 14.0:smr-nov-2024-r1 | 14.0:smr-oct-2022-r1 | 14.0:smr-oct-2023-r1 | 14.0:smr-oct-2024-r1 | 14.0:smr-sep-2022-r1 | 14.0:smr-sep-2023-r1 | 14.0:smr-sep-2024-r1 | 15.0 | 15.0:smr-apr-2025-r1 | 15.0:smr-aug-2025-r1 | 15.0:smr-feb-2025-r1 | 15.0:smr-jan-2025-r1 | 15.0:smr-jul-2025-r1 | 15.0:smr-jun-2025-r1 | 15.0:smr-mar-2025-r1 | 15.0:smr-may-2025-r1 | 16.0 | 16.0:smr-aug-2025-r1

1 vendor · 1 product

References

2 links