How severe is CVE-2021-25487?

CVE-2021-25487 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2021-25487 being actively exploited?

Yes. CVE-2021-25487 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-29, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-25487?

CVE-2021-25487 primarily affects Samsung Android. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25487?

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-2021-25487 have an EU (EUVD) identifier?

Yes. CVE-2021-25487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-12383. It is also flagged as exploited in the EUVD (since 2023-06-29).

When was CVE-2021-25487 published?

CVE-2021-25487 was published on 2021-10-06 and last updated on 2026-06-17.

CVE-2021-25487

CVE-2021-25487 is a high-severity vulnerability in Samsung Android with a CVSS 3.x base score of 7.3. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-06-29). The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 4.6
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-06-29)
EU (EUVD) id: EUVD-2021-12383
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-06-29)
Weakness: CWE-125
Affected product: Samsung Android
Published: 2021-10-06
Last modified: 2026-06-17

Description

Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

Frequently asked questions

What is CVE-2021-25487?: Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.
How severe is CVE-2021-25487?: CVE-2021-25487 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2021-25487 being actively exploited?: Yes. CVE-2021-25487 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-29, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-25487?: CVE-2021-25487 primarily affects Samsung Android. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25487?: 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-2021-25487 have an EU (EUVD) identifier?: Yes. CVE-2021-25487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-12383. It is also flagged as exploited in the EUVD (since 2023-06-29).
When was CVE-2021-25487 published?: CVE-2021-25487 was published on 2021-10-06 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:o:samsung:android:8.1:-:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-apr-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-aug-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-feb-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-jan-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-jul-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-jun-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-mar-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-may-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:9.0:smr-sep-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-apr-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-aug-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jan-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jul-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jun-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-mar-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-may-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-sep-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-apr-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-aug-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-feb-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-jan-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-jul-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-jun-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-mar-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-may-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:11.0:smr-sep-2021-r1:*:*:*:*:*:*

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