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

criticalknown exploitedCVE-2025-21043
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code.

CSIRTS triage

vendor: SamsungRemote code execution
What
The vulnerability allows remote attackers to execute arbitrary code via an out-of-bounds write.
Who is affected
Users of affected Samsung mobile devices.
Urgency
Remediation is urgent as the vulnerability is actively exploited and poses a critical risk.
Action
Update affected Samsung mobile devices to the latest software version.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-10-02
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-21043

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-21043coverage & exploitation statusNVD · CVE.org

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