How severe is CVE-2025-21043?

CVE-2025-21043 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21043 being actively exploited?

Yes. CVE-2025-21043 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-10-02, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-21043?

CVE-2025-21043 primarily affects Samsung Android. In total, 103 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21043?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-21043 have an EU (EUVD) identifier?

Yes. CVE-2025-21043 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29028. It is also flagged as exploited in the EUVD (since 2025-10-02).

When was CVE-2025-21043 published?

CVE-2025-21043 was published on 2025-09-12 and last updated on 2026-06-17.

CVE-2025-21043

CVE-2025-21043 is a high-severity vulnerability in Samsung Android with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-10-02). The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-10-02)
EU (EUVD) id: EUVD-2025-29028
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-10-02)
Weakness: CWE-787
Affected product: Samsung Android
Published: 2025-09-12
Last modified: 2026-06-17

Description

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

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.
How severe is CVE-2025-21043?: CVE-2025-21043 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21043 being actively exploited?: Yes. CVE-2025-21043 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-10-02, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-21043?: CVE-2025-21043 primarily affects Samsung Android. In total, 103 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21043?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-21043 have an EU (EUVD) identifier?: Yes. CVE-2025-21043 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29028. It is also flagged as exploited in the EUVD (since 2025-10-02).
When was CVE-2025-21043 published?: CVE-2025-21043 was published on 2025-09-12 and last updated on 2026-06-17.

References

Affected products (103)

cpe:2.3:o:samsung:android:13.0:-:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-apr-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-apr-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-apr-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-aug-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-aug-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-aug-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-aug-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-dec-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-dec-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-dec-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-feb-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-feb-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-feb-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-feb-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jan-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jan-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jan-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jan-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jul-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jul-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jul-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jul-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jun-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jun-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jun-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jun-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-mar-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-mar-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-mar-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-mar-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-may-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-may-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-may-2024-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-may-2025-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-nov-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-nov-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-nov-2023-r1:*:*:*:*:*:*

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