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Known exploited vulnerability

CVE-2025-21043

criticalCVSS 3.1 9.8In CISA KEVEPSS 2.2%Published · Samsung Mobile

The short answer

CVE-2025-21043 affects Samsung Mobile Samsung Mobile Devices and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-10-02: attackers are using it, so patch it first.

What it is

Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-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 Oct 2, 2025

Federal due date Oct 23, 2025

EPSS, next 30 days

2.2%

Higher than 83% 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-2025-21043 being exploited?

Yes. CISA added CVE-2025-21043 to its Known Exploited Vulnerabilities catalog on 2025-10-02, with a federal remediation due date of 2025-10-23.

How do I fix CVE-2025-21043?

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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