CVE-2025-21042
Samsung Mobile Devices Out-of-Bounds Write Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 December 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 35.58% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 10 November 2025 · due 1 December 2025
- Weakness
- CWE-787
- Affected
- samsung/android
- Source
- mobile.security@samsung.com
EPSS moved from 34.5% on 21 October 2026 to 35.6% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21042
References
- https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04Vendor Advisory
- https://unit42.paloaltonetworks.com/landfall-is-new-commercial-grade-android-spyware/Technical Description, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21042US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.