CRITICAL CISA KEV

CVE-2025-21043

CVSS v3

9.8

CRITICAL

EPSS Score

4.9%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

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

CISA Known Exploited Vulnerability

Date Added
10/2/2025
Patch Due Date
10/23/2025
Ransomware Use
Unknown

Technical details

Published
9/12/2025

Frequently asked questions

What is CVE-2025-21043?

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

Is CVE-2025-21043 actively exploited?

Yes. CVE-2025-21043 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 10/23/2025.

What is the CVSS score for CVE-2025-21043?

CVE-2025-21043 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2025-21043 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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