CVE-2025-21043
CriticalExploitedPublic exploitOut-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Published Sep 12, 2025 · Updated Oct 8, 2026
Key Facts
Patch immediately- CVE-2025-21043 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Android (Samsung), Samsung Mobile Devices.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 12, 2025. Public exploit code is available.
- EPSS estimates a 2.1% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
2.1%
Higher than 81.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-21043 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 2, 2025 | Oct 23, 2025 | Not reported |
| Industry KEV feed | Sep 12, 2025 | Oct 23, 2025 | Not reported |
| CIRCL KEV | Oct 2, 2025 | Oct 23, 2025 | Not reported |
| ENISA EUVD | Oct 2, 2025 | n/a | Not reported |
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 Products
106 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AndroidSamsung | 13.0, 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 | n/a |
| Samsung Mobile Devices | See advisory | n/a |
Timeline
Publicly disclosed
Sep 12, 2025
Added to Industry KEV feed
Sep 12, 2025
Added to CISA KEV
Oct 2, 2025
Added to CIRCL KEV
Oct 2, 2025
Added to ENISA EUVD
Oct 2, 2025
Last updated
Oct 8, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryhttps://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Affected: Android (Samsung) versions 13.0, 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; Samsung Mobile Devices. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 12, 2025.
Yes. It was added on Oct 2, 2025 with a federal remediation due date of Oct 23, 2025.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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