CVE-2025-21043
Samsung Mobile Devices: Out-of-Bounds Write
As of , CVE-2025-21043 in Samsung Mobile Devices is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.
- Exploited
- Yes: CISA listed it on 2 October 2025
- US federal deadline
- 23 October 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.02Higher than 81% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- Vendor advice: security.samsungmobile.comLinks below, from CISA's entry.
What CISA says to do
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's required action
What the flaw is
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code.
CISA's description
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
The CVE record's description, from SamsungMobile
- CVE published
- 12 September 2025
- Assigned by
- SamsungMobile
- CVSS
- 8.8 High (CVSS 3.1, from the CNA)
- CWE-787
- Out-of-bounds Write
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Mobile Devices: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2025-21042Out-of-Bounds Write | Samsung Mobile Devices | Patch soon | 0.33 | ||
| CVE-2021-25337Improper Access Control | Samsung Mobile Devices | Patch soon | 0.03 | ||
| CVE-2023-21492Insertion of Sensitive Information Into Log File | Samsung Mobile Devices | Patch soon | 0.03 | ||
| CVE-2021-25369Improper Access Control | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25370Memory Corruption | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25371Unspecified | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25372Improper Boundary Check | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25487Out-of-Bounds Read | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25489Improper Input Validation | Samsung Mobile Devices | Patch soon | 0.01 | ||
| CVE-2021-25394Race Condition | Samsung Mobile Devices | Patch soon | 0.00 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org