How severe is CVE-2025-21043?

CVE-2025-21043 has a CVSS 3.1 base score of 8.8 (HIGH). EPSS estimates a 2.1% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

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

CISA Known Exploited Vulnerabilities

Samsung Mobile Devices Out-of-Bounds Write Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2025-10-02

Remediation due

2025-10-23

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 · CNA8.8 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Samsung Mobile	Samsung Mobile Devices	SMR Sep-2025 Release in Android 13, 14, 15, 16 (unaffected)

References

1 Links

Other references

https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09

Record Details

Published

2025-09-12

Last updated

2026-02-26

Assigner (CNA)

SamsungMobile

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.