CVE-2025-21042
Actively exploited. CVE-2025-21042 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-11-10) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2025-21042 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so. This vulnerability could allow remote attackers to execute arbitrary code.
CSIRTS triage
- What
- An out-of-bounds write vulnerability could allow remote attackers to execute arbitrary code.
- Who is affected
- Users of Samsung mobile devices are affected.
- Urgency
- Immediate remediation is necessary as the vulnerability is critical and actively exploited.
- Action
- Update Samsung mobile devices to the latest firmware.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 96% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2025-21042 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2025-21042: Samsung Mobile Devices Out-of-Bounds Write Vulnerabilitycisa-kev · 2025-11-10
External references
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[](https://www.csirts.com/cve/CVE-2025-21042)