CVE-2025-21042
CriticalExploitedPublic exploitOut-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.
Published Sep 12, 2025 · Updated Oct 8, 2026
Key Facts
Patch immediately- CVE-2025-21042 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 Nov 7, 2025. Public exploit code is available.
- EPSS estimates a 33% 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)
33%
Higher than 98.3% 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-2025-21042 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 Apr-2025 Release 1 allows remote attackers to execute arbitrary code.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 10, 2025 | Dec 1, 2025 | Not reported |
| Industry KEV feed | Nov 7, 2025 | Dec 1, 2025 | Not reported |
| CIRCL KEV | Nov 10, 2025 | Dec 1, 2025 | Not reported |
| ENISA EUVD | Nov 10, 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
90 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-aug-2022-r1, 13.0-smr-aug-2023-r1, 13.0-smr-aug-2024-r1, 13.0-smr-dec-2021-r1 | n/a |
| Samsung Mobile Devices | See advisory | n/a |
Timeline
Publicly disclosed
Sep 12, 2025
Added to Industry KEV feed
Nov 7, 2025
Added to CISA KEV
Nov 10, 2025
Added to CIRCL KEV
Nov 10, 2025
Added to ENISA EUVD
Nov 10, 2025
Last updated
Oct 8, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryhttps://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04
- advisoryVulnCheck 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 Apr-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-aug-2022-r1, 13.0-smr-aug-2023-r1, 13.0-smr-aug-2024-r1, 13.0-smr-dec-2021-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 Nov 7, 2025.
Yes. It was added on Nov 10, 2025 with a federal remediation due date of Dec 1, 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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