CVE-2025-21043

criticalknown exploitedcovered by 1 sourcefirst seen 2025-10-02

Actively exploited. CVE-2025-21043 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-02) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching 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: Samsung Remote 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.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 70% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2025-21043: Samsung Mobile Devices Out-of-Bounds Write Vulnerabilitycisa-kev · 2025-10-02

External references

NVD record for CVE-2025-21043

CVE.org record

CISA KEV catalog

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