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Known exploited vulnerability

CVE-2025-21042

criticalCVSS 3.1 9.8In CISA KEVEPSS 36%Published · Samsung Mobile

The short answer

CVE-2025-21042 affects Samsung Mobile Samsung Mobile Devices and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-11-10: attackers are using it, so patch it first.

What it is

Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.

Weakness: CWE-787.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Nov 10, 2025

Federal due date Dec 1, 2025

EPSS, next 30 days

36%

Higher than 98% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

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.

Affected products

Samsung Mobile Devices. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2025-21042 being exploited?

Yes. CISA added CVE-2025-21042 to its Known Exploited Vulnerabilities catalog on 2025-11-10, with a federal remediation due date of 2025-12-01.

How do I fix CVE-2025-21042?

CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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